Mitsubishi Electric QJ71E71-100 User Manual page 350

(b) When disconnection is detected
Tnc = Td + St + Tsw
• Tnc
• Td
• St
• Tsw
The following shows the system switching operation timing if disconnection is detected.
QJ71E71-100
Station No.1
QJ71E71-100 (station No.1)
Scan time of the system A CPU
Scan time of the system B CPU
QJ71E71-100 (station No.2)
*1 For details on CPU system switching time, refer to the following.
QnPRHCPU User's Manual (Redundant System)
348
: System switching time
: Disconnection detection monitoring time
: One scan time
:
CPU system switching time
Disconnected
Control system (system A)
Tracking cable
Disconnected
Operating as a control system
Td
System A
Control system
System B
Standby system
Operating as a standby system
*1
Connected device
Standby system (system B)
Operating as a standby system
Issuing a system
switching request
Standby system
Tsw
Control system
Operating as a control system
Tnc
QJ71E71-100
Station No.2