Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE Manual, os 30
109
24 NOVEMBER 2015
VCL RUNTIME RATES
VCL is an interpreted language. Each line of VCL code is converted (compiled)
into a set of codes and then ash loaded into the controller. e controller
interprets these codes one line at a time while the system is powered up. Here
are the processing rates of the various functions:
function function full name instances service rate
ABS Absolute Value 2 4 ms
ADC Analog to Digital Converter Input 2 1 ms
CAN CAN Communications 24 4 ms
CPY Copy 8 4 ms
DLY Delay 32 1 ms
FLT Filter 4 1 ms
LIM Limit 4 4 ms
MAP Map 8 4 ms
MTD Multiply then Divide 4 4 ms
NVM Non-Volatile Memory 38 2 ms
PID Proportional Integral Derivative 2 4 ms
POT Potentiometer Input 2 8 ms
PWM Pulse Width Modulated Output 6 4 ms
RMP Ramp 4 1 ms
SCL Scaling 8 4 ms
SEL Selector, 2-position switch 8 4 ms
SEL_4P Selector, 4-position switch 8 32 ms
SW Switch Input 1* 4 ms
TMR Timers (hourmeters) 3 1 ms
* There is only one Switch variable; it has 16 associated bit-variables.
I/O CONTROL WITH VCL
Digital Inputs
e controllers each have 16 digital inputs. Nine are switch inputs (Sw_1
through Sw_8, and Sw_16. ese switch inputs are shown on the standard
wiring diagram (Figure 3, page 12). e remaining seven digital inputs are less
obvious: one on each driver and digital output (Sw_9 through Sw_15). ese
can be used as digital inputs or to sense the state of the output or its wiring
(e.g., open coil check).
To address a digital input in a VCL program, use the desired input label
(Sw_1 through Sw_16). You must use On or O in the code when determining
a switch state; using true/false or 1/0 will give erroneous results.
8 — VCL
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