Rockwell Automation 25-COMM-P PowerFlex PROFIBUS DPV1 Adapter - Manual (Page 48)

48 Rockwell Automation Publication 520COM-UM004A-EN-E - November 2013
Chapter 6 Using Acyclic Messaging
PROFIBUS Slot and Index for Drive and Adapter Parameters
For accessing any parameter within a drive, a general mechanism is used to map
the parameter with a PROFIBUS slot and index number.
Every drive device port has a base slot number which supports 256 indices in a
slot. These slot and index combinations are mapped to various drive and adapter
parameters through the 25-COMM-P adapter. These are the general formulas
used to determine the slot and index numbers for a specific parameter.
Slot Number = Base Slot Number + Quotient of (parameter number / 256)
Index Number = Remainder of (parameter number / 256)
Due to PROFIBUS standard requirements of various identification and
maintenance functions, there is an exception to the rule for assigning
Host (drive)
parameters. When accessing
Host parameters, the slot number will start at 0x01.
This is the formula used to determine the slot number for a
Host parameter.
Slot Number = Base Slot Number + Quotient of (parameter number / 256) + 1
The following examples illustrates the use of these formulas.
Example 1: To access
Host parameter 41[Accel Time 1], see
PROFIBUS Slot
and Index for Drive and Adapter Parameters on page 48 to find the slot number
associated with Drive 0, which can be used to access the first 256 parameters. To
access parameters 257...512, the slot number will increment by 1, and so on.
For Drive 0, the base slot number is 0x00 + 1 (per the exception). Therefore, the
slot number can be calculated using the general formula:
Slot Number = 0x00 + Quotient of (41 / 256) + 1 (for Drive Host Parameters) = 0x01
The index number will be the remainder of the
Host parameter number divided
by 256, as shown using this formula:
Index Number = Remainder of (41 / 256) = 41
Example 2: To access
Device parameter 5 [Net Addr Cfg] in the adapter, see
PROFIBUS Slot and Index for Drive and Adapter Parameters on page 48 .
For
Device parameters, the base slot number is 0x15. Therefore, the slot number
can be calculated using the general formula:
Slot Number = 0x15 + Quotient of (5 / 256) = 0x15
The index number will be the remainder of the
Device parameter number divided
by 256, as shown using this formula:
Index Number = Remainder of (5 / 256) = 5
PROFIBUS Slot PROFIBUS Index Single Drive Multi-Drive
0x00 0x00...0xFF Not applicable – Profibus Not applicable – Profibus
0x01... 0x04 0x00...0xFF 0 – Drive 0 0 – Drive 0
0x05... 0x08 0x00...0xFF Not applicable 1 – Drive 1
0x09... 0x0C 0x00...0xFF Not applicable 2 – Drive 2
0x0D...0x10 0x00...0xFF Not applicable 3 – Drive 3
0x11...0x14 0x00...0xFF Not applicable 4 – Drive 4
0x15...0x18 0x00...0xFF 6 – Adapter 5 – Adapter
0x19 0x00...0xFF 5 – DSI Device Not applicable
>0x1A 0x00...0xFF Reserved Reserved