Timing Chart - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

■Timing chart

This section describes a timing chart for each system switching cause.
• Communication error detection (alive check error)
Communications have not been performed
with the external device for a fixed period.
Operating as a control system
RJ71EN71 (system A)
Scan time of the system A CPU
System A Control system
System B Standby system
Scan time of the system B CPU
RJ71EN71 (system B) Operating as a standby system
• Communication error detection (ULP timeout occurrence)
No response from the external device
RJ71EN71 (system A) Operating as a control system
Scan time of the system A CPU
System A Control system
System B Standby system
Scan time of the system B CPU
RJ71EN71 (system B) Operating as a standby system
• Disconnection detection
Disconnected
RJ71EN71 (system A)
Operating as a control system
Scan time of the system A CPU
Control system
System A
Standby system
System B
Scan time of the system B CPU
RJ71EN71 (system B) Operating as a standby system
(Tr = 2)
Tsi Ti Ti Ti
System switching time
Operating as a standby system
Ttu
Issuing a system
switching request
Standby system
Tsw
Control system
Operating as a control system
System switching time
Operating as a standby system
Td
Issuing a system
switching request
Standby system
Tsw
Control system
Operating as a control system
System switching time
Operating as a standby system
Issuing a system
switching request
Standby system
Tsw
Control system
Operating as
a control system
Appendix 7 Processing Time
A
APPX
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