Rockwell Automation RECOMM-IBUS Interbus Communications Module - Manual (Page 63)

Using Explicit Messaging (PCP Communications) 7-3
7.3 PCP Communications
Peripheral Communications Protocol (PCP) messages are used for
Explicit Messaging, which is not part of the normal Interbus
I/O data scan. The scanner takes care of all of the details of
establishing a connection for PCP communication services. PCP
communications can be used to:
• Read or write DPI Host (SP600 drive, etc.) parameters
• Read or write RECOMM-IBUS parameters
• Read DPI Host (SP600 drive, etc.) faults
• Read RECOMM-IBUS events
See table 7.1.
The Command Interface for the SST SLC Interbus scanner must be
enabled for PCP Communications to take place:
• Bit 12 of word 1 in the G File must be set
• Word 5 in the G File must be set to the length of process data
required in the M Files. This value can range from 0 to 224.
• Word 6 in the G File must be set to the maximum length of the
command buffer. This value can range from 0 to 128 and must be
non-zero to enable the buffer.
Table 7.1 – PCP Message Definition
Name
PCP - Index Value
Range
Access
Rights Description
Hex Decimal
Host Parameters 3001 to
(3001
+n) 12289
to
(12289
+ n) Host
Parameter
Dependent 3001 (12289
Dec) =
Parameter 1 -
etc.
Host Fault Queue 2FF9 to
3000 12281
to
12288 Read Only Host fault
queue
containing up
to 8 faults
RECOMM-IBUS
Parameters 2FB6 to
2FEE 12214
to
12270 Parameter
Dependent 2FB6 (12214
Dec) =
Parameter 1 -
etc.
RECOMM-IBUS
Event Queue 2FAE to
2FB5 12206
to
12213 Read Only Module event
queue (8
events)