Curtis 1239E - Page 109

Return to TOC Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
10 — VEHICLE CONTROL LANGUAGE (VCL)
pg. 105
Parameters EEPROM variables are a special type of EEPROM variable that is intended to be used
to create OEM dened 1313/1314 programmer parameters. ese parameters can be dened as 16-
bit by using the P_User variables or they can be dened as bit (On/O ) by using the P_User_Bit
variables. ese variables are typically written to EEPROM through the 1313 handheld or 1314 PC
programmer interface (i.e., when a user changes a parameter setting using the 1313). ey can be
used in the VCL code, but changing a P_User (or P_User_Bit) value with VCL will only change the
variable value in RAM and will not change the value in EEPROM. us, these variables are intended
for creating and dening 1313/1314 programmable parameters only.
us, these variables are intended for creating and dening 1313/1314 parameters only.
VCL can modify the control mode parameters in RAM by using the VCL variable name for the
programmable parameter. For example,
Brake_Rate_SpdMx = 3000 ;Change Brake Rate to 3.0sec
will change the RAM value of the Speed Mode Express’s Brake Rate; the new value will be used
in determining the braking rate. However, the value of the parameter’s stored EE value remains
unchanged; when the controller is turned o, the RAM value will be lost. e next time the controller
is powered back on, the “old” value of Brake Rate will be restored from EE memory. To save this
RAM value in VCL, use the NVM_Write_Parameter function ((i.e., NVM_Write_Parameter(Brake_
Rate_SpdMx)).
Parameter values that are changed by using the 1313 handheld or 1314 PC programmer are saved
directly to EE memory. e 1313/1314 changes will be retained and restored the next time the
controller is powered back on.
e table below summaries the available VCL variables.
Type Quantity Range
RAM 420 variables
User1 – User200
User_Long1 – User_Long16
AutoUser1 – AutoUser300
NVUser EEPROM 15 variables NVUser1 – NVUser15
Block EEPROM 38 blocks (15 variable each) NVM3 – NVM40
Parameters EEPROM
150 variables and P_User1 – P_User150
10 variables of 8 bits each (80 bits) P_User_Bit1 – P_User_Bit10