
Chapter 1 Network Configuration
1 – 7
(3) Serial interface module (EH-SIO)
1. Communication with Serial communication equipments (General-purpose communication)
User program performs communication with external equipments. “TRNS 9” which is a command for EH-SIO
performs EH-SIO control by EHV-CPU and transmitting and receiving of data.
RS-232C
Bar code reader
Host
RS-422
Figure 1.9 System configuration at general-purpose communication
2. Communication with Modbus protocol support equipments
EH-SIO can communicate by Modbus protocol. Modbus slave equipments can be controlled with communication
by setting EH-SIO to a master.
And I/O of EHV-CPU can be accessed from the host by Modbus protocol.
RS-485
Up to 32 units
Inverter
SJ-200
AC servo
ADAX
4
-series
Inverter
SJ-200
Figure 1.10 System configuration in controlling equipments supporting Modbus
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