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SIA-D_
Rev. 07
51 / 117
ISO 9001:2008
The following status bits are associated with this process:
Measurement error
Problem in the measurement block
Protection error
Problem in the protection block
Eeprom Error
Problem in the eeprom memory, default settings
Events Error
Error in the register of events
On the other hand, “Default settings” means that the equipment is operating under factory settings,
being all protection functions disabled.
5.9. Communication
The SIA-C relay can communicate with a local computer through its front RS232 port, or through a
remote SCADA system through the rear RS485 port. The rear RS485 port is optional and must be
specified on the list of models.
The ports RS232 and RS485 are switched. The RS232 port has preference.
5.10. Front Communication. RS232
The RS232 communications port is installed on the front of the equipment. The connector that is
used is a DB-9 female – DCE. The protocol that is used is Modbus RTU (19200 -8bit – no parity – 1
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