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PACSystems™ RSTi
-EP EPSCPE100 Standalone CPU Quick Start Guide
GFK-3012E
Modbus RTU Configuration
The CPE100 can be configured as a Modbus RTU Slave device using either or both the
serial ports (RS-232 and RS-485) located on the underside of the controller. The Serial
Port Setup COMMREQ function can be used to activate a Modbus RTU protocol over
a serial port.
To configure the Serial Port COMMREQ Data Block on CPE100, refer to section 6.1.6
of the PACSystems RX3i and RSTi-EP CPU Reference Manual, GFK-2222.
Serial I/O Configuration
The CPE100 may be configured to use Serial I/O protocol using either or both serial
ports (RS-232 or RS-485). The Serial Port Setup COMMREQ function can be used to
activate a Modbus RTU protocol over a serial port.
To configure the Serial Port COMMREQ Data Block on CPE100, refer to section 6.1.6
of the PACSystems RX3i and RSTi-EP CPU Reference Manual, GFK-2222.
Serial I/O protocol is active only when the CPU is in RUN Mode, since it is driven
completely by COMMREQ functions in the application program. The different
COMMREQ commands that are supported by Serial I/O Protocol are described in
section 6.2.4 of the PACSystems RX3i and RSTi-EP CPU Reference Manual,
GFK-2222.
