Pccc Object - Leuze electronic MSI 400 Series Manual

Class Instance
30 1
8.4.7

PCCC Object

PCCC (pronounced "P C Cube") is used in several PLCs from Rockwell Automation/Allen Bradley, which
still continue to be used. It was developed before CIP and EtherNet/IP were defined. PCCC telegrams are
either:
a) Encapsulated in CIP packages (e.g. via EtherNet/IP)
b) The encapsulation of CIP packages.
The MSI 430 module supports the encapsulation of PCCC data in CIP packages, as described above un-
der b). For this, the class ID 0x67 = 103 was specified.
The PCCC commands listed in the following table are supported by the MSI 430 module.
All PCCC-related data with a size of 16 bits (word) are available in the "Little Endian" format. This means
that the byte with the lowest value is executed first.
Tab. 8.11: PCCC commands supported by the MSI 430 module
Type CMD
PLC-5 0x0f
PLC-5 0x0f
PLC-5 0x0f
PLC-5 0x0f
SLC 0x0f
SLC 0x0f
SLC 0x0f
SLC 0x0f
8.4.7.1 PCCC Telegram Structure
Each request telegram comprises 7+5 header bytes.
Tab. 8.12: PCCC request header
Name Data type
Length USINT
Vendor UINT
S/N UDINT
CMD USINT
STS USINT
TNSW UINT
FNC USINT
Each answer telegram comprises 7+4 header bytes or 7+4+1 header bytes, if the state byte is 0xf0.
Leuze electronic
Attribute Access Data type
5 Read
FNC Description
0x00 Word Range Write [chapter 8.4.7.2]
0x01 Word Range Read [chapter 8.4.7.3]
0x67 Typed Write [chapter 8.4.7.4]
0x68 Typed Read [chapter 8.4.7.5]
0xa1 Protected Typed Logical Read with 2 Address
Fields [chapter 8.4.7.6]
0xa2 Protected Typed Logical Read with 3 Address
Fields [chapter 8.4.7.8]
0xa9 Protected Typed Logical Write with 2 Address
Fields [chapter 8.4.7.7]
0xaa Protected Typed Logical Write with 3 Address
Fields [chapter 8.4.7.9]
Description
Header size
Vendor ID of the requester
Serial number of the requester
Command
State
Transport sequence number
Function code
Description
BOOL Group state of all output termin-
als (state of instances 529 to 584
of class 8)
MSI 400
EtherNet/IP gateway
Data range
0 = No error,
1 = Error
Command supported by
PLC‑3, PLC‑5, PLC‑5/250
PLC‑3, PLC‑5, PLC‑5/250
SLC 5/03, SLC 5/04, PLC 5,
PLC‑5/250, PLC‑5/VME
SLC 5/03, SLC 5/04, PLC 5,
PLC‑5/250, PLC‑5/VME
MicroLogix-1000, SLC 500,
SLC 5/03, SLC 5/04, PLC 5
MicroLogix-1000, SLC 500,
SLC 5/03, SLC 5/04
Size Data range
1 byte 7
2 byte
4 byte 0 to 2
1 byte 0x0f
1 byte 0
2 byte 1 to 65535
1 byte 0x67, 0x68,
0xa2, 0xaa
32
-1
80