CM2904 Instruction Book © 2009 - 2022 Parker-Hannifin Corporation Page 31 of 51
CM2904 Standard software
Message definitions
Byte
Bit
Description
Type
Values
1
1
:
8
PWM 1 duty %
Command
0…250
Step = 0,4%
Range = 0…100%
2
1
:
8
PWM 2 duty %
Command
3
1
:
8
PWM 3 duty %
Command
4
1
:
8
PWM 4 duty %
Command
5
1
:
8
PWM Frequency Hz for all
channels
Command
0…1000Hz
6
1
:
8
Command
7
Not used
8
Not used
6.3.7. Diagnostic Message
Transmission repetition rate:
1000 ms
Data length:
8 Bytes
Default priority:
6
Parameter group number:
(EFCAhex)
Message structure according to J1939 standard, message DM1.
6.3.8. Fault codes
Table 21: Fault codes
Fault Description
SPN
FMI
PWM1 Short circuit
697
6
PWM1 Open load
697
5
PWM2 Short circuit
698
6
PWM2 Open load
698
5
PWM3 Short circuit
701
6
PWM3 Open load
701
5
