164 ACS550 User’s Manual
Embedded Fieldbus
* = Active low
For the 1xxxx registers:
• Additional discrete inputs are added sequentially.
The ACS550 supports the following Modbus function codes for discrete inputs:
3xxxx Mapping – Modbus Inputs. The drive maps the following information to the
3xxxx Modbus addresses called Modbus input registers:
• Any user defined analog inputs.
The following table summarizes the input registers:
The ACS550 supports the following Modbus function codes for 3xxxx registers:
4xxxx Register Mapping. The drive maps its parameters and other data to the
4xxxx holding registers as follows:
• 40001…40099 map to drive control and actual values. These registers are
described in the table below.
• 40101…49999 map to drive parameters 0101…9999. Register addresses that do
not correspond to drive parameters are invalid. If there is an attempt to read or
write outside the parameter addresses, the Modbus interface returns an
exception code to the controller.
10028 STATUS WORD – Bit 27 Reserved REQ_REF1
10029
STATUS WORD – Bit 28 Reserved REQ_REF2
10030 STATUS WORD – Bit 29 Reserved REQ_REF2EXT
10031 STATUS WORD – Bit 30 Reserved ACK_STARTINH
10032 STATUS WORD – Bit 31 Reserved ACK_OFF_ILCK
10033
DI1DI1 DI1
10034 DI2DI2 DI2
10035 DI3DI3 DI3
10036
DI4DI4 DI4
10037 DI5DI5 DI5
10038 DI6DI6 DI6
Function Code Description
02 Read input status
Modbus
Reference
ACS550
All Profiles
Remarks
30001
AI1 This register shall report the level of Analog Input 1 (0…100%).
30002 AI2 This register shall report the level of Analog Input 2 (0…100%).
Function Code Description
04 Read 3xxxx input status
Modbus
Ref.
Internal Location
(All Profiles)
ABB DRV
(5305 = 0 OR 2)
DCU PROFILE
(5305 = 1)
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