54
SI-INTERBUS User Guide
Issue Number: 1
8.3
Mode 3 - Peripheral Communications Protocol V2.0
The PCP non-cyclic mode is an object based protocol for implementing services that
are more complex than unconfirmed cyclic data transfer. If selected, the PCP protocol
supported by the SI-Interbus module uses the first word of the transmitted and received
data. Unlike the non-cyclic modes 1 and 2, PCP mode is not represented in the
mapping parameters (Pr
MM.010
to MM.029) and can only be selected by the mode
parameter (Pr
MM.005
) and not explicitly mapped.
When an Interbus network is initialised, each node supporting PCP is assigned a
Communication Reference, or CR. Supported objects are shown in
and the supported services are shown in
8.3.1
PCP object specification
Table 8-19 PCP object specification
8.3.2
PCP supported services
Peripheral Communication Protocol (PCP) version 2.0 will be used. Only server
functionality is provided.
The supported services are shown in
Attribute
Setting
Value
Index
0x5000
Menu
Sub-index
Parameter (>0)
Parameter (>0)
Object Code
ARRAY_OBJECT
Array object
Data Type Index
INT32
Signed 32 bit value
Length
4
Four Octets
Number of Elements
200
Up to parameter 200
Password
0
None
Access Groups
0
None
Access Rights
ACC_WRITE_ALL
and
ACC_READ_ALL
Read and Write
Local Address
0
Not used
Variable Name
Menu
Menu
Extension
Not supported
Not supported
