Lenze PROFIBUS E84AYCPM - Telegram Examples; Read Request: Querying the Heatsink Temperature

9 Parameter data transfer
9.2 DRIVECOM parameter data channel (DP-V0)
59
Lenze · E84AYCPM communication module (PROFIBUS®) · Communication Manual · DMS 5.0 EN · 11/2012 · TD17
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
9.2.7 Telegram examples
9.2.7.1 Read request: Querying the heatsink temperature
The heatsink temperature of the inverter is to be read.
• Code to be read: C00061
• Heatsink temperature: 43 °C
Byte 1: Service (request)
Request = 0t110001
bin
• Bit 0 ... 2 = 001
bin
for read request
• Bit 3 = 0 (reserved)
• Bit 4/5 = 01
bin
for 2-byte data length (only relevant for the response telegram)
• Bit 6 = handshake bit (t ≡ status is changed in the response telegram)
• Bit 7 = status bit (only relevant for the response telegram)
Byte 2: Subindex
Subindex = 0 because code C00061 does not contain any subindices.
Bytes 3+4: Index
Index = 24575 - code number = 24575 - 61 = 24514 = 0x5FC2
• Byte 3 (high byte) = 0x5F
• Byte 4 (low byte) = 0xC2
Bytes 5 ... 8: Data
The response telegram contains the value of code C00061:
Data 3 + 4 = 43 [°C] x 1 (internal factor) = 43 = 0x002B
Result:
Request telegram from master to drive:
Response telegram from drive to master (for correct execution):
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Service Subindex Index
High byte
Index
Low byte
Data 4 Data 3 Data 2 Data 1
0x01 0x00 0x5F 0xC2 0x00 0x00 0x00 0x00
0t000001
bin
00000000
bin
01011111
bin
11000010
bin
00000000
bin
00000000
bin
00000000
bin
00000000
bin
Waiting for change of handshake bit 6 in service byte 1 of the response.
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Service Subindex Index
High byte
Index
Low byte
Data 4 Data 3 Data 2 Data 1
0x11 0x00 0x5F 0xC2 0x00 0x2B 0x00 0x00
0t010001
bin
00000000
bin
01011111
bin
11000010
bin
00000000
bin
00101011
bin
00000000
bin
00000000
bin