Curtis 1239E - 10 - VEHICLE CONTROL LANGUAGE (VCL); I;O CONTROL WITH VCL

Return to TOC Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
10 — VEHICLE CONTROL LANGUAGE (VCL)
pg. 103
10 — VEHICLE CONTROL LANGUAGE (VCL)
e Curtis 1239E/1269E controller has a built-in programmable logic controller with application-
specic functions. VCL (Vehicle Control Language) soware provides a way to implement unique
and complex vehicle control functions.
VCL is a simple programming language that will feel very familiar to anyone who has worked with
BASIC, Pascal, or C. Working with VCL requires the installation of the WinVCL program onto a PC.
WinVCL will compile VCL programs and ash download the soware into the controller through the
computer’s serial port. e install process for WinVCL will also install two important manuals on the
PC: the VCL Programmer’s Guide and the VCL Common Functions Manual. ese two manuals, which
are in PDF format, include more detailed information about VCL than is included here.
is chapter of the manual summarizes VCL and also describes aspects and functions of VCL that
are specic to the 1239E/1269E controller. For a more complete understanding of the functions and
capabilities of VCL, see the WinVCL User’s Guide, VCL Programmer’s Guide, and VCL Common
Functions Manual.
Summary of VCL Basics
• VCL is not case-sensitive:
put_pwm(), Put_PWM(), and PUT_PWM() are identical.
• Spaces in variable names are not allowed in VCL; use underscores in place of spaces.
Example: Forward_Offset is the VCL name for the 1313/1314 parameter
Forward Oset.
• Functions are followed by parentheses; for example:
Reset_Controller() is a function
Reset_Voltage is a variable.
• Logical statements must be inside parentheses; examples:
IF (setpoint >50)
ELSE IF ((setpoint <20) & (temperature >100)).
• Comments are preceded by semicolons.