3 — PROGRAMMABLE PARAMETERS
Curtis Model 1351 – December 2018
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pg. 56
PARAMETER ALLOWABLE RANGE DEFAULT DESCRIPTION
Kp
Driver_X_Kp
Parameter’s CAN Index by
Driver_X_Kp
1 = 0x3190 0x00
2 = 0x3191 0x00
3 = 0x3192 0x00
4 = 0x3193 0x00
1 – 100 %
20 – 2048
8 %
163
The proportional section of the PI (Proportional/Integral) current
regulator within the 1351 system controller.
X= 1 – 4 for the VCL name Driver_X_Kp
The Kp term is the proportional gain, which acts immediately upon
the error between the command the actual system state. Higher
gains will tend to drive that error lower. The Ki term (below) is the
integral gain. The integral gain will accumulate the current droop
and attempt to bring the Driver current droop back to 0 amperes.
Higher Ki gains will react more strongly and quickly.
Therefore, this parameter determines how aggressively the PI
controller attempts to match the driver current command. Larger
values provide tighter control.
If the gain is set too high, oscillations can occur as the controller
tries to control the Driver current. If it is set too low, the Driver
current may behave sluggishly and be difcult to control.
Ki
Driver_X_Ki
Parameter’s CAN Index by
Driver_X_Ki
1 = 0x31A0 0x00
2 = 0x31A1 0x00
3 = 0x31A2 0x00
4 = 0x31A3 0x00
1 – 100 %
20 – 2048
8 %
163
Integral section of the PI (Proportional/Integral) current regulator
(controller).
X= 1 – 4 for the VCL name Driver_X_Ki
The integral term (Ki) forces zero steady state error so the Driver
will run at the commanded current in conjunction with the Kp
parameter (above). Larger values provide tighter control.
If the gain is set too high, oscillations can occur as the controller
tries to control the Driver current. If it is set too low, the Driver
may take a long time to approach the exact commanded current.
Test
Command
Driver_X_Command
Variable’s CAN Index by Driver_X_
Command
1 = 0x3360 0x00
2 = 0x3361 0x00
3 = 0x3362 0x00
4 = 0x3363 0x00
0.0 – 100.0 %
0 – 1000
0 % The Driver command. It corresponds to the driver’s control mode
type setting. This is the steady-state input command, ramping,
and initial levels are applied after and upon this command.
X= 1 – 4 for the VCL name Driver_X_Command
Note that this is activated (used) in VCL. This is not a settable
parameter per se.
Driver 5 through 10 X = 5 – 10 for the Driver number (X) which is part of the VCL parameters’ and monitor-variable name
PWM
Driver_X_PWM
Variable’s CAN Index by Driver_X_
PWM
5 = 0x3374 0x00
6 = 0x3375 0x00
7 = 0x3376 0x00
8 = 0x3377 0x00
9 = 0x3378 0x00
10 = 0x3379 0x00
0.0 – 100.0 %
0 – 1000
Read Only The driver’s PWM percentage.
X= 5 – 10 for the VCL name Driver_X_PWM
100% equates to the driver being fully ON, meaning 100 percent
of the Coil Return voltage (B+) is applied to the load (e.g.,
contactor coil).
50% equates to an applied voltage of 50%
0 % turns off the driver.
This variable is also located in Monitor:
Monitor\Outputs\PWM Drivers\Driver X\PWM
Current
Driver_X_Current
Variable’s CAN Index by Driver_X_
Current
5 = 0x3334 0x00
6 = 0x3335 0x00
7 = 0x3336 0x00
8 = 0x3337 0x00
9 = 0x3338 0x00
10 = 0x3339 0x00
0.000 – 4.000 Amps
0 – 4000
Read Only The Amperage through Driver X
X= 5 – 10 for the VCL address Driver_X_Current
This variable is also located in Monitor:
Monitor\Outputs\PWM Drivers\Driver X\Current
OUTPUTS — PWM DRIVERS, cont’d
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