Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations GregLocock on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Remote commands to P127 relay

Status
Not open for further replies.

bejoyeleengineer

Electrical
Mar 23, 2011
1
Hello,
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.
Thanking You,
Bejoy Jacob,











 
Status
Not open for further replies.

Part and Inventory Search

Sponsor