B&R Industries X20 System, User Manual

Page: 1971 / 2720

X20 system modules • Motor controllers • X20MM4456
X20 system User's Manual 3.10 1971
4.25.5.15.4.5 Channel errors
Name:
CurrentError01 to CurrentError04
OverCurrentError01 to OverCurrentError04
If an error is detected, the corresponding error bit in this register remains set until the error is acknowledged using
bit 4 in the respective "control register".
Data type Value
USINT See bit structure.
Bit structure:
Bit Description Value Information
0 No error 0 CurrentError01
1 Open load error
0 No error 1 OverCurrentError01
1 Overcurrent errorOutput deactivated.
0 No error 2 CurrentError02
1 Open load error
0 No error 3 OverCurrentError02
1 Overcurrent errorOutput deactivated.
0 No error 4 CurrentError03
1 Open load error
0 No error 5 OverCurrentError03
1 Overcurrent errorOutput deactivated.
0 No error 6 CurrentError04
1 Open load error
0 No error 7 OverCurrentError04
1 Overcurrent errorOutput deactivated.
Overcurrent error
An overcurrent error is registered if one of the following conditions is met:
•
≥10 A flow from a PWM output for at least 2 seconds
•
≥16 A flow for 3 consecutive PWM cycles
•
All PWM outputs together consume more than 32 A on the X3 connector
In all three cases, the affected PWM output is deactivated by the firmware (i.e. the pins on the PWM output are
short-circuited). The user must acknowledge the error using bit 4 in the respective control register before a PWM
output deactivated in this manner can be made operational again.
Open load error
An open load error is only registered in current control mode (see bit 12 in the respective configuration register)
if the current setpoint is not reached. In some cases this can be caused by an open line, although usually the
impedance of the load is too high.