24: REMOTE I/O SYSTEM
OPENNET CONTROLLER USER’S MANUAL 24-11
Special Internal Relays for INTERBUS Master Information
Three special internal relays are assigned for the INTERBUS master station control and status information.
Allocation
No.
Description R/W
CPU
Stopped
Power
OFF
M8030 INTERBUS Master Initialize
When M8030 is turned on, the INTER-
BUS master is initialized.
R/W Maintained Cleared
M8036 INTERBUS Master Bus NG
When the INTERBUS master detects a
BUS NG, M8036 is turned on.
R Maintained Cleared
M8037 INTERBUS Master Peripheral Fault
When the INTERBUS master detects a
peripheral fault, M8037 is turned on.
R Maintained Cleared
M8040 INTERBUS Master Error
When critical error is found in the INTER-
BUS master hardware/software and the
master is initialized, M8040 or M8041 is
turned on, depending on error contents.
R Cleared Cleared
M8041 INTERBUS Master Error R Cleared Cleared
Caution
• When the remote I/O network is subjected to large noises, the remote I/O communication is
affected. When such a trouble occurs, it is possible to initialize the remote I/O master module to
restore normal operation. Include special data register D8178 (INTERBUS master system error
information) in the user program to detect any error in the remote I/O system.
• When the CPU module at the remote I/O master station and the remote I/O slave modules are pow-
ered up simultaneously, the remote I/O master module may fail to recognize the slave modules. If
this trouble occurs, include special data register D8179 (INTERBUS master status transition num-
ber) to detect failure to run.
• Include special internal relay M8030 (INTERBUS master initialize) in the user program and turn
on M8030 to initialize the remote I/O master module.
M8125
REPS1 –
D8178
D1 –
M1
CMP<>(W) S2 –
0
M1
M2
M8125 is the in-operation output special
internal relay.
D8178 stores 0 during normal operation.
When D8178 is not equal to 0, M1 is
turned on.
D8179 stores 5 during normal operation.
When D8179 is not equal to 5, M2 is
turned on.
When either M1 or M2 is turned on,
M8030 is turned on for one scan to initial-
ize the master module.
SOTU
REPS1 –
D8179
D1 –
M2
CMP<>(W) S2 –
5
Note: When M8030 is turned on, outputs of the remote I/O slave modules are initialized. For exam-
ple, when using IDEC’s SX5S communication I/O terminals as slave modules, all outputs are turned
off during initialization and restore normal operation to turn on or off according to the output data
transmitted from the OpenNet Controller CPU module.
M8030
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
To Next Page
Loading...
Need help?
General
