System Using The Sil2 Process Cpu - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

System using the SIL2 Process CPU

This section describes safety communications performed in the system using the SIL2 Process CPU.
Following modules are required for the system using the SIL2 Process CPU.
• SIL2 Process CPU
• SIL2 function module
• Redundant function module
• RJ71GF11-T2 with a firmware version of "25" or later
• Remote head module with a firmware version of "05" or later
• Module set to the SIL2 mode
These modules can be used in a system containing a submaster station only when the master station is
redundant.
System configuration
A system using the SIL2 Process CPU is configured as described below.
System configuration
Redundant master station
Redundant line
There are no network topology restrictions even when a system using the SIL2 Process CPU is configured. However,
configuring a system using ring topology is recommended, because if a cable disconnection occurs or a faulty station occurs
in a system other than the systems using the SIL2 Process CPU, system switching can be avoided by the loopback function.
■Redundant master station
For the redundant master station, the master station and the submaster station are connected with a tracking cable. When an
error occurs in the control system master station (safety station) (1), the control is switched to the standby system submaster
station (safety station) (2) to continue safety communications.
(1) (3) (4)
(3) SIL2 Process CPU
(4) SIL2 function module
(5) Redundant function module
(6) RJ71GF11-T2
(7) Tracking cable
(8) Remote head module
(9) Module set to the SIL2 mode
1 FUNCTIONS
112
1.8 Safety Communication Function
(5) (6)
(8)
Description
The master station is configured in a redundant system.
Each of the control system and standby system is configured on a different
network to make the network line redundant.
(7)
(2) (3)
(9)
(4) (5) (6)