Hello,
I, Bejoy Jacob ,working as a Testing Engineer and presently working on a project in Saudi Arabia based on your Relay P127 would like to clarify some quires on the communication by remote commands on the relay.
As I have joined new into the company – I don’t have a company email Id- so I will be sending through my personal mail.
Recently I have connected the P127 (AA0F112BB V11-B) having serial no. 44084665 to a SCADA (I-Fix –GE Fanuc)through the RS232/RS485 converter and was able to retrieve all the data’s from the relay but I was trying to write data on 0400 register by using writing function code F9 i.e. By using addressing format 401025. But with this I am not able to write data. I wanted to know if what I have given in the relay setting is all enough to write data from SCADA to the relay.
I am trying to write 0 and 1’s to the address 401025 and there after checking if the status for the output relay has activated. I will be brief in my explanation below:
In the relay setting I have activated:
AUTOMATIC CONTROLS –TRIP COMMANDS - TRIP(Part 1) ----------Ctrl Trip
AUTOMATIC CONTROLS –OUTPUT RELAYS – TRIP------------- OUTPUT 2
AUTOMATIC CONTROLS –OUTPUT RELAYS –CB CLOSE & SOFT ------------------OUTPUT 3
AUTOMATIC CONTROLS –OUTPUT RELAYS – CTRL TRIP AND CLOSE –(CTRL TRIP –OUTPUT 2) AND –(CTRL CLOSE –OUTPUT 3)
Hope these are the only parameters that I will have to set? If there is anything else that I have to activate in the relay kindly do inform.
Now at the SCADA side I have taken
300020:1 ---- to view the status of RL2 output relay when a trip command is given by SCADA (0013 (HEXA) Output relays operation command – Bit - 1 )
300020:2----- to view the status of RL3 output relay when a close command is given by SCADA(0013 (HEXA) Output relays operation command – Bit - 2 )
401025:3 ------(400-- Address(hex) Remote control word and Function code ----F9 ---Bit 3: remote tripping (CONTROL trip)) As per the manual.
401025:4 ------(400-- Address(hex) Remote control word and Function code ----F9 ---Bit 4: remote closing (CONTROL close))
Now if my understanding is right – if is give a “1” to the write address 401025:3 of SCADA – it will write 1 into the P127 relay and pick the RL2 output relay and in case the relay output RL2 is wired to the tripping coil of the breaker- it gives a trip command and trips the breaker.
if is give a “1” to the write address 401025:4 of SCADA – it will write 1 into the P127 relay and pick the RL3 output relay and in case the relay output RL3 is wired to the closing coil of the breaker- it gives a close command and closes the breaker.
Hope this is how it works. Kindly do inform if this is not the right idea.
As of now I have tried writing as per the above method but I have not seen any changes happening in the relay output status.
Kindly do look into this matter as I have a deadline for finishing this task and have been working on this for the past 3 days with no results.
Thanking You,
Bejoy Jacob,
Testing Engineer,
Mohammad Al- Ojaimi Cont Estd.(Project with Al-Osais)
