FLYGT APP 541, Руководство пользователя

Страница: 73 / 76

Phase RTU SCADA system
7 Terminates the connection.
NOTICE:
To prevent the RTU from sending alarms not included in the SCADA system, change the
alarm priority to "C" for relevant alarms in the RTU.
Max Buffer Size (Advanced Settings)
The information provided below is intended for integration purposes and should be used
together with the Open manual.
The Scada system must not exceed the Max buffer size in the RTU when requesting
registers or other data.
Protocol Max No. of registers in one reply Max No. of digital I/O in one reply.
Modbus 47 760
Comli(*) 32 512
Keep in mind: The max reply Buffer Size is 100 bytes.
(*) The limitation is in Comli, where the data bytes are limited to 64.
When a GSM modem is used, GSM-network delays may cause the SCADA system to
timeout. To solve this:
• Increase the timeout setting in the SCADA system, or
• Decrease the number of registers/IO in each request.
Appendix C: SCADA Systems
APP 541 User manual 71