Thursday, May 12, 2016

Automatically Generate Screenshots of Foxboro I/A Graphics

At work we have a Foxboro I/A control system. I was getting a lot of requests to take screenshots of control system graphics - which I don't mind fulfilling, because usually someone wants to make something better.

I wanted a better way to fulfill these requests! Something that can do everything at once.

I found an old post on the "Foxboro Freelist", a user-run mailing list for Foxboro system maintainers. Back in November I posted an improved version, but I have improved it again since (continue reading).
for DISP in $(find /opt/graphics/disp/ /opt/graphics/control/ /opt/graphics/trend/ /opt/graphics/loadout/disp/ /opt/graphics/powerhouse/ -name "*.fdf")
do
cd d:
pref -SPR1SR dmcmd /opt/graphics/disp/BLANKSCRN.fdf
sleep 2
echo $DISP
pref -SPR1SR dmcmd $DISP
sleep 5
cd 'C:/Program Files (x86)/HyperSnap 6'
echo $PWD
FILE=$(echo `date +%Y-%m-%d`$DISP | sed 's/\//-/g')
echo $FILE
SAV="D:/opt/screenshots/$FILE.png"
echo $SAV
HprSnap6 -snap:awin -save:png $SAV
pref -SPR2SR dmcmd close
done
exit
 Notes:

  • In the first FOR statement, you can specify as many graphics subfolders as you want. 
  • Replace SPR1SR with the DM (Display Manager) name of the FoxView instance you will be working on. The script calls the graphic to the DM you specify, then calls HyperSnap via its command line interface to take a screenshot. 
    • Just to be clear, the script WILL open these graphics live on your AW (application workstation) and take a screenshot. It won't happen in the background. So if you have any graphics that invoke scripts when opened or closed, exclude those folders from the FOR statement. 
    • This will tie up your AW for however long it takes to open all of your graphics. I like to run the script at the end of the day. If the screensaver comes on, it does not seem to matter. 
  • Create a blank graphic (BLANKSCRN.fdf) for the script to call in between live process graphics. 
  • The sleep commands are necessary because Foxboro users know that graphics don't load instantly - graphics need to query data from the OM (Object Manager) before they're usable. 
  • Assumes you have HyperSnap 6 installed (should ship with all AW's)
  • The output file is named with the date, folder path and filename. For example, 2016-05-12-path-to-graphic-filename.fdf.png. 
  • The echo statements are unnecessary, but it is useful to see their output for debugging. 
  • Save the above as a .ksh file and run in the Kornshell environment. 
  • If you want to generate screenshots of overlay files (popups), change this:
    • pref -SPR1SR dmcmd $DISP
    • to this:
    • pref -SPR1SR dmcmd "dmcmd ov $DISP -l MIDDLE -move"
Since coming up with this script, we generate screenshots of 200+ graphics on a monthly basis and drop them in a network folder on our Business LAN. This way, anyone who is interested can take a look at the current state of the control graphics, find errors and suggest improvements. 

Drop me a line if you find this through Google - I'd love to know if this helped you out! 

Wednesday, April 6, 2016

Quiche Lorraine

More Great British Bake Off-inspired cooking - I made Quiche Lorraine today. I've never made a quiche before in my life! It was fun and delicious.

I found this recipe that was the main inspiration, but I wanted to add broccoli so I took some hints from this recipe too. I also have a 22cm tin and the recipe called for 20cm, so I tried to scale everything up a bit.

Final ingredients list for my version:

Pastry
100g butter, cubed
200g all-purpose flour
3 1/4 tbsp cold water

Hand mix flour & butter to crumb consistency, add water, form dough ball, roll out on floured counter, set in tin, refrigerate 20-30 minutes, blind bake 10 minutes at 450 degrees, remove blind and bake 10 more minutes.

Filling
6 strips of bacon
1 big onion, sliced & carmelized
1 medium broccoli crown, cut small and added to the onions for the last 10 min of carmelization
160g Gruyère cheese, grated 4 large eggs
200 ml whipping cream
100 ml whole milk
Salt & pepper

It ended up taking about 40-45 minutes in the oven at 350 degrees.

Results

It was GREAT if I do say so myself! Could have used a bit more salt, a bit more filling overall, but I'd make this again for sure.



Sunday, February 28, 2016

Great British Bake Off

Robyn got me hooked on this show called the Great British Bake Off. It has inspired me to try baking a couple of the tastier looking things on the show.

Here is Mary Berry's Lemon Tart:

Not bad for a first crack!

Here is a fruit tart that uses the same sweet crust recipe as the lemon tart, with a crème pâtissière (from this recipe) filling. The crust turned out nicer looking this time:

The recipes are brilliant because they're in grams; you can't possibly muck up the measurements.

I made one slip up on the fruit tart. I used Masa Harina for "corn flour", but I should have used corn starch (only the US and Canada refer to "corn starch", the rest of the world calls it corn flour"). It still tastes fine, but the texture is a little bit off. The other UK-ism is that caster sugar is sold as berry sugar in Canada.

Saturday, February 6, 2016

Homemade Soylent (Schmilk)

In 2013 I read about Soylent, a "nutritionally complete" meal replacement beverage invented by a software engineer, who started a 30-day experiment to see if he could survive on the stuff. His experiment morphed into a crowdfunding campaign with a feed-the-world-cheaply theme and he raised millions of dollars to start mass-producing it for sale.

Do people need "real food" to survive and thrive, or can we break food into its macro- and micronutrient components and reassemble those pieces to create something equivalent? Possibly better?

A lot of people were intrigued by the same question and the "powdered food scene" seemed to grow a lot in 2013 & 2014.

The shipping date of Soylent to Canada was never confirmed. When I started getting serious about losing weight in 2015 I started doing some research on homemade, powdered food meal replacements. The appeal was:

  • Easily portionable and measureable (to meet caloric needs)
  • Inexpensive 
  • Easily hackable (for instance, easy to bump up the protein content or lower the carbohydrate content by adjusting the formula) 
  • The buzz-phrase "nutritionally complete" kept popping up. 

As it turns out, Soylent (the company) hosts a recipe section on their website where users can submit and review recipes.

A 450-calorie serving of homemade Soylent

I found one called Schmilk Chocolate that I thought I'd try. It uses whole milk as a source of fat and protein. I made a batch and had it for breakfast every day for a week. It was pretty good! Bland, but not offensively so.

Since early summer 2015, I have been eating/drinking this homemade Soylent every workday for both breakfast and lunch. For supper and meals on weekends I have "real food". I have observed no ill-effects whatsoever (including excess flatulence, which some Soylent users had trouble with).

The positives are:

  • Easy to make. I mix the powdered ingredients with whole milk a meal ahead; the consistency is better if it sits in the fridge for a while.  
  • Easy to measure (12.6 grams of powder + 100 ml of whole milk = 108 calories. Scale however is appropriate. I started drinking 670 calorie portions, then 550, currently 450). 
  • Easy to consume - you just drink it! 
  • Tastes okay. Hard to describe; it's so bland that there are not any defining offensive flavours. The balance of fat, salt, and everything else seems to tell the body "this is good". I usually add an espresso shot for flavour. 
  • Makes me feel satiated and satisfied until the next meal. 
  • Keeps me regular.
Now that I'm basically at my goal weight, I don't think I am going to stop with Soylent any time soon. It's a part of my routine, and something I miss if my routine is interrupted. 

Recipe - Schmilk Chocolate - "5 day" Batch

1 kg Oat Flour (Only Oats brand comes in 1 kg bags) 
60 g Cocoa powder
53 g Acacia Fibre
30 g Psyllium Husk powder
16 g Iodized Salt 
5.5 g Potassium Citrate 
5.5 g Choline Bitartrate 
2 g Stevia Powder 
1.5 g Xanthan Gum 
5 g (or 5 daily servings) Multivitamin (powder)
9500 ml Whole Milk

Recipe notes:
  • Most ingredients can be found in health food stores, all can be found online. 
  • Mix all dry ingredients ahead of time.
  • Food scale required. 
  • 12.6 g powdered mixture + 100 ml whole milk = 108 calories.
  • Recommend mixing at least 1 hour before consuming for better consistency. 

Friday, January 29, 2016

Weight Loss

I think I've got this weight loss thing figured out.

In Montreal in 2011, I started writing a blog post called "Losing weight with common sense", because I was going to make all of these "sensible" changes to melt off the pounds, and hold myself accountable by blogging. Thankfully, I never hit the submit button, and those sensible changes - like eating an enormous plate of salmon and broccoli with a side of four beers and a half bag of chips for an evening snack - never paid off.

I've been overweight since my early teens. By World Health Organization standards, that means having a BMI of >25. In at least part of my high school years I was obese (>30 BMI - at 6'5" that's >114.7 kg or >253 lbs). I wasn't interested in sports, and I sure wasn't interested in moderation. I didn't particularly care, and I didn't have the understanding/knowledge to do anything differently.

In October 2014 I got a Fitbit One to use as a silent wake-up alarm, because Robyn couldn't stand my old alarm clock. Putting a step tracker in my pocket piqued some interest in weight management and I started occasionally tracking my weight for the heck of it. I clocked in at 113.4 kg; just a hair under "obese" on the BMI scale.

In November of that year, Robyn's dad passed away suddenly and unexpectedly. He was in his 50's, healthy and active. This was shocking. I started thinking - a lot - about the limited time we have on Planet Earth. I was 28; about half Paul's age.

By Spring of 2015 I had been fiddling with the Fitbit app, and mustering up inspiration to get serious about changing my habits, health and appearance. I had been reading posts in reddit's r/Fitness, r/loseit and r/fatlogic. r/fatlogic was actually the best inspiration - the subreddit showcases examples of anything that "deviates from the scientific facts of body weight management". It was a wake-up call to recognize some of those behaviours in myself (those small internal justifications I made before smashing a whole bag of Ruffles All-Dressed potato chips).

I learned that diet is the key to weight management, not exercise (although I do not dispute the value of exercise!). I learned about calories, got a food scale, and started counting.

I couldn't believe how effective it was. I plugged in a weight loss target into the MyFitnessPal app (0.5 kg/week) and it gave me a calorie allowance. By maintaining the discipline to weigh and count everything that went into my body (and estimating generously when nutritional info was unavailable), the weight disappeared at a perfectly consistent rate:

Weight loss target was 0.5 kg/week from April to December. Slowed down to 0.25 kg/week in December. Almost at my "maintenance weight" target of 85kg. 

RESULTS

Starting weight: 113.4 kg (250 lbs) - October 2014
Starting BMI: 29.6
Starting waist: 38-40"

Current weight: 85.7 kg (189 lbs) - Today
Current BMI: 22.4
Current waist: 34"

A couple tricks I used to stay motivated:

  • Daily weigh-ins, but ignore daily fluctuations. This built a rich data set and let me see that the day-to-day doesn't matter so much as the week-to-week and month-to-month. It's about lifestyle changes, not daily changes. 
  • Didn't give up up my love for snacks, just found different snacks. Tomato basil rice cakes smothered in hot sauce and beef jerky, mmm. 
  • Log absolutely everything. Estimate high if unsure. 
  • Try my best to avoid going over daily calorie limits. If I go over, it's not the end of the world. Just hit my limit the next day. 
  • Ditched the calorie counting features in Fitbit for MyFitnessPal - a much better app and food database. 
  • The key has really been education and understanding. I failed in 2011 because I thought motivation was enough to succeed. Success, at least for me, is dependent on knowledge, goal-setting, and data. 
  • Because I have the knowledge, I feel I can maintain these habits indefinitely. It's not a quick fix, it's a lifestyle change. 
Next steps - turn 30 in April with a healthy BMI for the first time in over half of my life, maintain current weight around the 85kg mark, turn remaining fat stores into muscle starting this spring when I can get out and start running again. That's a blog post for another day! 

Feels good, man. 

Saturday, November 28, 2015

Summer of Baseball 2015

2015 was the summer of baseball! 

Robyn and I saw the Jays play 3 games against the Twins in May, in Minnesota.


I went on a trip with my parents to Seattle in July to see the Jays play the Mariners.


Robyn had a business trip in Chicago, so I flew down to meet her for a weekend and we saw the Cubs play two games at the White Sox. Somehow, I missed taking pictures of this!

Coolest of all, we impulse-travelled to Toronto to see Game 1 & 2 of the ALDS - Texas Rangers @ Toronto. So intense, even though we lose those 2 games!


Best summer ever!

Friday, August 7, 2015

By default, E3+ overload relays have a "reset" button that doubles as a "test trip" button

Long time, no blog!

At work the other day we came across an interesting situation. We had a motor that we just couldn't get started. Wiring was good, communication was good, no faults being recorded...but every time we hit the start button the motor instantly tripped.

Here's how we figured out the issue.

At Vanscoy, all of our big expansion project MCCs (motor control centres) use E3+ relays and DeviceNet for motor protection and control. These relays are like the circuit breakers in your house; they trip if there is too much current passing through them, but unlike your home's circuit breakers you can program them with more advanced and specific settings for different types of trips.

While in your house you switch a tripped breaker back to the ON position to reset it, these E3+ relays have a "TEST/RESET" button on the front. If your motor pulls too much current, the E3+ trips to protect the equipment, and an operator has to go hit the reset button to clear the fault.

(the faults are also re-settable over DeviceNet, so programmers can enable different behaviours like reset functionality with an HMI or a field stop button)

There is a programmable "Test Enable" parameter (#103) in the E3+ relays. When enabled, this parameter changes the changes the behaviour of the reset button on the front of the E3+ as follows:

  • An instantaneous TEST/RESET button press clears the faults/trips from the relay and allows you to resume operations. 
  • A button press >= 2 seconds generates a test trip, causing your motor (if running) to stop. 
A potash mill generates a lot of dust and humidity, and mechanical devices - including buttons - are failure-prone. What we had here was a sticky reset button that was maintaining a test trip. As soon as the motor was given a start command, it would trip. 

The solution was a two-parter:
  1. Fix the sticky reset button (we don't want faults to be instantaneously cleared without properly understanding them) 
  2. Disable the "Test Enable" parameter on the E3+ so that the "TEST/RESET" button could only clear faults, not generate them. 
Taking a step back, our problem was that we never bothered to understand what the "TEST" part of "TEST/RESET" meant - we had no idea this "Test Enable" feature existed, and didn't know the single button (that we thought was simply a reset button) had different functions. 

I think the "Test Enable" feature is a probably a good one. During construction and commissioning, being able to generate a test trip allows for testing the trip protection on the relay, as well as the functionality of any PLC monitoring the trips. 

But for anyone searching the 'net for E3+ relay info - I'd recommend that as part of a commissioning procedure, the "Test Enable" parameter be disabled as one of the final steps. This insulates plants from tricky-to-troubleshoot failures caused by sticky reset buttons.