Rockwell Automation T3151 ICS Regent Real time Clock Communications Modules - Manual (Page 10)

Real-Time Clock Communications Modules (T3151)
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Industrial Control Services
Multidrop
Supports Regent R2 protocol for multidropped Regents
connected to a PC running the W
INTERPRET application (or
other third-party supporting products and gateways). Ports
configured for multidrop communications require a node
number.
ASCII
Used by the Regent to transmit ASCII output messages to
external serial equipment such as printers and VDUs. ASCII
output messages are programmed using the ASCII output
element in ladder logic function blocks.
Net Master/Net Slave
Used by the Regent for Guarded Peer-Link communications to
other multidrop Regents. These ports require a node number.
Modbus
Supports connection to external Modbus communications
equipment that acts as a Modbus Master (the Regent is a
Modbus Slave). A Modbus port supports the Modbus RTU
protocol. Modbus ports can be used in point-to-point or
multidrop configurations. These ports require a node number.
Maintenance
Each real-time clock communications module has a
replaceable lithium battery. The purpose of this battery is to
provide sufficient backup power to keep the real-time clock
running.
The battery used in the module has a shelf life of
approximately 10 years. When providing power to the
module's memory during a power failure, the battery can
provide backup power to a real-time clock communications
module's memory for approximately six months.
Battery Replacement
To replace the battery in a real-time clock communications
module remove the module from the controller chassis and lay