Rockwell Automation 20-COMM-P Profibus Adapter - Manual (Page 75)

Using Explicit Messaging (Parameter Protocol) 6-5
Parameter Message Response
Word Description
1 PNU - Parameter Number (Bit 0-10)
Requested parameter number.
SPM (Bit 11)
Reserved - is always set to 0.
RC - Response Code (Bit 12-15)
One of the following codes will be sent:
0 = No request
1 = Transfer parameter value (8-bit & 16-bit word)
2 = Transfer parameter value (32-bit word)
3-6 = Reserved
7 = Request rejected. Error message is found in Word 3, see table below for
fault number description.
8 = No parameter change rights
9-15 = Reserved
2 IND - Index
Port ID of requested parameter
3 PVA - Parameter value (32-bit high word)
The Parameter value, if the parameter is 32 bits, the most significant bytes are
placed here.
If a fault was requested (Parameter 1024-2048), this word contains the fault
code, that identifies the fault.
4 PVA - Parameter value (32-bit low word or 8-bit & 16-bit word)
The Parameter value, if the parameter is 32-bits, the least significant bytes are
placed here. If the parameter is 16-bit or lower, the entire result is placed in this
word.
If a fault was requested (Parameter 1024-2048), the MSB contains the DPI Port
number that caused the fault, and the LSB contains the DPI object instance that
cause the fault.
Fault number Description
101 Service not supported (i.e., Set service to a read-only parameter)
102 Service not valid
104 Parameter does not exist (i.e., Parameter number>max number of
parameters)
106 Data value out of range (i.e., Set value is out of range)
107 State conflict (i.e., Parameter is not changeable while the product is in
an operating state)
20COMM-UM006A-EN-P.book Page 5 Friday, September 28, 2001 10:43 AM