Baumer Absolute encoder, Руководство пользователя

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Baumer_EAM580_360_SAE_J1939_MA_EN_Rev0003.0000h_Index0002.docx Baumer Electric AG
06.08.2018 12/27 Frauenfeld, Switzerland
5.2 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”
5.2.1
Identifier Examples
Identifier for Cyclic PGN 65450 message:
PGN 65450 => in Hex => 0xFFAA

PDU-Field = 0xFF (Value > 240 -> PDU2 format with Group Extension is used)

Group Extension = 0xAA
ECU-Address = 172 = 0xAC
Parameter Group Number
Description Priority Extended
Data page
Data
Page
PDU Format
(PF)
Destination Address
Group extension
Source address
(ECU address)
Value 6 0 0 0xFF
0xAA
0xAC
Bit
28 … 26
25 24
23 … 16 15 … 8 7 … 0
Cob-ID [Hex] 0x18FFAAAC
Identifier for Acyclic PGN 61184 message, used for read command from another device to the encoder)
PGN 61184 => in Hex => 0xEF00

PDU-Field = 0xEF (Value < 240 -> PDU1 format with Destination Address is used)

Dest. Address = 0xAC (default address of Encoder, could be higher, according to address claim)
Parameter Group Number
Description Priority Extended
Data page
Data
Page
PDU Format
(PF)
Destination
Address
Group extension
Source address
(ECU address)
Value 6 0 0 0xEF
0xAC
0x00
Bit
28 … 26
25 24
23 … 16 15 … 8 7 … 0
Cob-ID [Hex] 0x18EFAC00