GE 350 Communications Manual page 21
Protective relay platform
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CHAPTER 2: RS485 INTERFACE
OBJECT
OBJECT
VARIATION
NO.
NO.
2
50
1
60
0
1
2
3
4
80
1
NOTE:
SR3 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE
DESCRIPTION
32-bit Analog Input
Reporting Deadband
Time and Date (default -
see Note 1)
Class 0, 1, 2, and 3 Data
Class 0 Data
Class 1 Data
Class 2 Data
Class 3 Data
Internal Indications
No Object (function code
only) see Note 3
No Object (function code
only)
No Object (function code
only)
1.
A default variation refers to the variation response when variation 0 is requested and/
or in class 0, 1, 2, or 3 scans. The default variations for object types 1, 2, 20, 21, 22, 23,
30, and 32 are selected via relay settings. This optimizes the class 0 poll data size.
2.
For static (non-change-event) objects, qualifiers 17 or 28 are only responded when a
request is sent with qualifiers 17 or 28, respectively. Otherwise, static object requests
sent with qualifiers 00, 01, 06, 07, or 08, will be responded with qualifiers 00 or 01 (for
change event objects, qualifiers 17 or 28 are always responded.)
Cold restarts are implemented the same as warm restarts – the 3 Series relay is not
restarted, but the DNP process is restarted.
REQUEST
FUNCTION
QUALIFIER CODES
CODES (DEC)
(HEX)
2 (write)
00, 01 (start-stop)
07, 08 (limited
quantity) 17, 28
(index)
1 (read)
00, 01 (start-stop) 06
(no range, or all) 07,
08 (limited quantity)
17, 28 (index)
2 (write)
00, 01 (start-stop)
07, 08 (limited
quantity) 17, 28
(index)
1 (read)2 (write)
00, 01 (start-stop) 06
(no range, or all) 07
(limited qty=1) 08
(limited quantity) 17,
28 (index)
1 (read) 20
06 (no range, or all) ---
(enable unsol) 21
(disable unsol) 22
(assign class)
1 (read) 22
06 (no range, or all) ---
(assign class)
1 (read) 20
06 (no range, or all)
(enable unsol)
07, 08 (limited
quantity)
21 (disable unsol)
22 (assign class)
1 (read)
00, 01 (start-stop)
(index =7)
2 (write) (see
00 (start-stop) (index
Note 3)
=7)
13 (cold restart)
---
14 (warm restart) ---
23 (delay meas.) ---
DNP PROTOCOL SETTINGS
RESPONSE
FUNCTION
QUALIFIER CODES
CODES (DEC)
(HEX)
---
---
129 (response)
00, 01 (start-stop)
17, 28 (index) (see
Note 2)
---
---
129 (response)
00, 01 (start-stop)
17, 28 (index) (see
Note 2)
---
---
---
---
---
---
---
---
129 (response)
00, 01 (start-stop)
---
---
---
---
---
---
---
---
2-11
- Quick Links:
- Modbus Protocol
- Modbus Memory Map
- Modbus User Map
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