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Fig.12：Function description of DIP switch on 87P4 CPU module
Note 1:
When parameter is changed, 87Pn will auto rechange the internal
communication parameters or system parameters, if the external control project
is running in the same time, it will cause communication error. Thus don't
change communication parameters and system parameter when system is
running.
Note 2:
if 87Pn's communication parameter has been changed, the external control
program must to change the related parameters synchronously.
Step3.
Communication parameters of I-87K I/O modules:
The communication parameters of 87K I/O modules are Auto-configured by CPU module.
Rule 1:
the Baud Rate & Checksum of the I/O modules on 87Pn expansion slot are
always the same as 87Pn CPU module.
(Default: Auto Config.: Enable , Baud Rate: 115200 , Checksum: Disable)
Rule 2:
the Net Address of I/O modules on the slot is based on 87Pn CPU module and
increment by 1.
(Ex. 87Pn CPU module=1, Slot0=2, Slot1=3, Slot2= (empty), Slot3=5....)
If there is no module on slot, the Net Address will be reserved. When the communication
parameters of 87Pn CPU module are changed, the parameters of I/O module will be
changed with the rules.
OFF
RU-87P1/2/4/8 User Manual, Version: 1.2
ON
Auto Config.
Enable
Checksum
Disable
Baud Rate
115200
16
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