CM2904 Instruction Book © 2009 - 2022 Parker-Hannifin Corporation Page 24 of 51
CM2904 Standard software
CM2904 Message types
•
Signals are updated on every cycle
•
Whenever the signal is changed, it will be sent latest on next cycle. This
means that the regular transmission repetition rate for signal changes is
20ms (max 2 cycles)
•
Signal states are to be sent latest in every 100ms, even there are no changes.
This is called “Forced update” and it will tell that the module & its signaling
is still alive in the case that there are no recent changes..
N
OTICE
For more information refer to following standards:
Valid signal parameters s. ISO11783-7;
Signal characterization s. ISO 11783-7;
Message format s. ISO 11783-7;
6.2. CM2904 Message types
Table 14: Message types
Message
Description
Notes
MDIN
Multi-stage Digital input status
ADC 1
MDIN1…MDIN4 measurements
with 0 - 32V range
ADC 2
ADC1…ADC4 measurements
with 0 - 8V range
ADC 3
ADC5…ADC8 measurements
with 0 - 8V range
FI & DIAG
Frequency Inputs and
Diagnostics
o
FI 1: 0-1024 Hz
o
FI 2: 0-1024 Hz
o
12 bit Quadrature encoder
counter (default value
2048)
o
Diagnostics:
