Toshiba GR200 Series Instruction Manual page 1425

Requirements in the Master station
11.4.2
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 11.4-1 Ping cycles between the master station and the IED
IEC103 master
Data request
Polling cycle:
Response frame
150ms or more
Data request
Response frame
- 1402 -
6F2S1914 (0.49)
IED
GRL200 (Soft 033 & 037)