OPERATION MANUAL CompoBus/S

I/O Link Units for CPM2C Section 5-10
Terminal Arrangement and Wiring
Note 1. All 8 input and 8 output points use the same node number.
2. The actual node number setting range depends on the PLC model in which
the Master is mounted as well as the Master’s settings. Refer to 2-1 Communications
Specifications for details.
Communications Mode Settings
The following communications modes are set with pin 5 of the DIP switch.
Pin 5
(DR)
Communications
mode
OFF High-speed Communications
Mode
ON Long-distance
Communications
Mode
Communications
distance
Communications
baud rate
Communications
cycle time
100 m max. 750 kbps 0.5 or 0.8 ms
500 m max. 93.75 kbps 4.0 or 6.0 ms
Note 1. Only the C200HW-SRM21-V1, CQM1-SRM21-V1, SRM1-CO@-V2, and
CPM2C-S Master Units can be Long-distance Communications Mode.
2. Make sure that the communications mode of the Slave is the same as that
of the Master Unit. If the communications modes are not the same, normal
communications with the Master Unit will not be possible. The operating
status of the Slave can be verified with LED indicators. Refer to 6-5-1 Indicators
for details.
Hold/Clear Outputs for Communications Error
Pin 6 is used to set the output data status when a communications error
occurs, as shown in the following table.
Pin 6 (HOLD) Setting
OFF Clear output status
ON Maintain output status
CompoBus/S
communications
CompoBus/S
communications
The BD H terminals are all
connected internally, as
are the BD L terminals.
When viewed from the CPM2C CPU Unit, the 8 input and 8 output points
under the CompoBus/S I/O Link Unit are allocated to the I/O memory (input
and output bits) of the CPU Unit, as is the case with Expansion I/O Units. One
input and one output words are allocated. Actual I/O operations are not performed
for the I/O memory of the CPM2C CPU Unit, but it is performed for the
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