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Overview of Safety Controllers
Chapter 1
High-speed Safety Protocol
GuardPLC 1600 and 1800 controllers support High-speed Safety
Protocol (HSP), which allows them to connect to the DeviceNet safety
network via the 1753-DNSI DeviceNet Safety Scanner.
Refer to the DeviceNet Safety Scanner for GuardPLC Controllers User
Manual, publication 1753-UM002, for more information.
Modbus RTU Slave
Modbus is a standard industrial non-safety-related serial protocol in
which the Modbus master can communicate with a maximum of 255
slave devices. The Modbus master initiates and controls all
communication on the network.
Modbus RTU Slave protocol is available via the RS-485 Comm 1 port
on GuardPLC 1600 and GuardPLC 1800 controllers with catalog
numbers ending in ‘M’.
Modbus RTU Slave protocol allows both the reading and writing of
data.
For more information on the Modbus RTU Slave protocol, see the
Modbus Protocol Specifications, available from
www.modbus.org/specs.
PROFIBUS DP Slave
PROFIBUS DP protocol is a non-safety-related serial protocol,
designed for high-speed data transmission between automation
systems and distributed peripherals.
PROFIBUS DP slave protocol is available via the RS-485 Comm 1 port
on GuardPLC 1600 and GuardPLC 1800 controllers with catalog
numbers ending in ‘P’.
PROFIBUS DP Slave protocol allows both the reading and writing of
data.
Publication 1753-UM001C-EN-P - March 2010
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