Baumer Absolute encoder Manual - Página 12
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Parameter Group Number (PGN)
The Parameter Group Number is an identifier for parameters.
The following PGN's are supported:
PGN 60928 (Name-Field)
PGN 61184 (Encoder Parameters)
PGN 65450 (cyclic process data)
Calculation of Parameter Group Number (PGN):
PDU1 Format:
PGN = "PDU Format Field" * 256 + 0 -> Only every 256 PGN number exist.
PDU2 Format:
PGN = "PDU Format Field" *256 + "Group Extension value"
Identifier Examples
5.2.1
Identifier for Cyclic PGN 65450 message:
PGN 65450 => in Hex =>
PDU-Field =
Group Extension = 0xAA
ECU-Address = 172 = 0xAC
Description
Priority
Value
6
28 ... 26
Bit
Cob-ID [Hex]
Identifier for Acyclic PGN 61184 message, used for read command from another device to the encoder)
PGN 61184 => in Hex =>
PDU-Field =
Dest. Address
Description
Priority
Value
6
28 ... 26
Bit
Cob-ID [Hex]
Baumer_EAM580_360_SAE_J1939_MA_EN_Rev0003.0000h_Index0002.docx
06.08.2018
0xFFAA
0xFF (Value > 240 -> PDU2 format with Group Extension is used)
Parameter Group Number
Extended
Data
PDU Format
Data page
Page
(PF)
0
0
0xFF
23 ... 16
25
24
0x18FFAAAC
0xEF00
0xEF (Value < 240 -> PDU1 format with Destination Address is used)
= 0xAC (default address of Encoder, could be higher, according to address claim)
Parameter Group Number
Extended
Data
PDU Format
Data page
Page
(PF)
0
0
0xEF
23 ... 16
25
24
0x18EFAC00
12/27
Destination Address
Source address
Group extension
(ECU address)
0xAA
0xAC
15 ... 8
7 ... 0
Destination
Source address
Address
(ECU address)
Group extension
0xAC
0x00
15 ... 8
7 ... 0
Frauenfeld, Switzerland
Baumer Electric AG