Toshiba GR-200 Series Instruction Manual page 841

Requirements in the Master station
11.5.3
In the master station of the IEC 60870-5-103 standard, the following specifications should be
followed in the respective IEDs:
1) Polling cycle: 150ms or longer
2) Timeout time (time to re-sending the request frame to the IED): 100ms
Figure 11.5-3 Ping cycles between the master station and the IED
IEC103 master
Data request
Polling cycle:
Response frame
150ms or more
Data request
Response frame
- 822 -
6F2T0200 (0.15)
IED
GRE200 (1,2)