GE DGP Series, Инструкция по эксплуатации

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DGP Digital Generator Protection System GE Power Management
9.7 FACTORY SETTINGS (GE FACTORY TESTS ONLY) 9 COMMUNICATIONS
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9.7 FACTORY SETTINGS (GE FACTORY TESTS ONLY) 9.7.1 DESCRIPTION
Normally the user can change the settings only if the settings that are in the relay are not corrupted. In a brand
new relay the contents of the EEPROM are undefined. Therefore the factory settings command should be
used to program the relay.
The factory command will be executed when the master sends the command with a slave address 0FFH (255
decimal). Note that slave address 255 is not a valid modbus slave address and is being used by the relay only
for GE internal factory commands.
The DGP relay will not respond to a CRC failure, if the slave address is 255. When the relay is placed in multi-
drop configuration, it possible to receive a slave ID of 255, due to some communication error. Therefore the
relay will not respond.
The only function IDs supported in Factory command are 10H, 06H, and 05H with a coil address correspond-
ing to the END (29H).
The factory settings are down loaded in three groups.
• Settings
• Station and Generator ID
• Model Number
After the factory settings are downloaded, the MASTER should send a END command with slave address 255
to make the changes effective.
The Settings and Station Generator ID will have the same register map as described in previous sections. The
model number can be written into registers 0000 to 000FH. Normally the model number registers are Read
Only registers. The only exception where they can be written are with factory commands.