OPERATION MANUAL CompoBus/S

Fiber Amplifier Communications Units Section 5-6
I/O Allocations
Note Fiber Amplifier Units that use two unit numbers (E3X-DA6TW, E3X-DA8TW)
must be counted as two Units when counting the number of Sensors.
Communications Mode Setting (Pin 2)
This pin is used to switch the CompoBus/S communications mode
Pin 2 (DR) Communications mode setting
OFF High-speed Communications Mode
ON Long-distance Communications Mode
Note The Slave communications mode setting must match the communications
mode setting of the Master Unit. If the communications modes are different,
the Master Unit will not communicate properly. Check the operating status of
the Slaves using the indicators.
Pin 1 OFF (Up to 6 Sensors)
Up to 6 Sensors can be connected in this mode. The data is 8 bits and is
stored in the IN Area, which is set as the node number area
Bit Contents
00 Unit 1 ON/OFF data
01 Unit 2 ON/OFF data
02 Unit 3 ON/OFF data
03 Unit 4 ON/OFF data
04 Unit 5 ON/OFF data
05 Unit 6 ON/OFF data
06 Sensor Communications Error Flag
07 Sensor Communications Flag
Sensor Communications Error Flag
Bit 06 turns ON when the registered number of Sensors does not match the
number of Sensors that are enabled to communicate, or when a communications
error occurs after communications have been established with the Sensors.
Sensor Communications Flag
Bit 07 turns ON when communications are established with the Sensors.
Pin 1 ON (Up to 14 Sensors)
Up to 14 Sensors can be connected in this mode. The data allocated is 16 bits
and is stored in the IN Area, as shown in the following table.
Node number Node numbers actually used
Odd number Node number setting − 1 to node number setting
Even number Node number setting to node number setting + 1
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