Fieldbus control with embedded fieldbus
255
Modbus mapping
The following modbus function codes are supported by the drive.
Register mapping
The drive parameters, Control/Status Word, references and actual values are
mapped to the area 4xxxx so that:
• 40001…40099 are reserved for drive control/status, reference and actual values.
• 40101…49999 are reserved for drive parameters 0101…9999. (E.g. 40102 is
parameter 0102). In this mapping, the thousands and hundreds correspond to the
group number, while the tens and ones correspond to the parameter number
within a group.
The register addresses that do not correspond with drive parameters are invalid.
If there is an attempt to read or write invalid addresses, the modbus interface returns
an exception code to the controller. See
on page
.
Function
Code
Hex (dec)
Additional information
Read Multiple
Holding Registers
03 (03)
Reads the contents of registers in a slave device.
Parameter sets, control, status and reference values are mapped as
holding registers.
Write Single
Holding Register
06 (06)
Writes to a single register in a slave device.
Parameter sets, control, status and reference values are mapped as
holding registers.
Diagnostics
08 (08)
Provides a series of tests for checking the communication between
the master and the slave devices, or for checking various internal
error conditions within the slave.
The following subcodes are supported:
00 Return Query Data: The data passed in the request data field is
to be returned in the response. The entire response message
should be identical to the request.
01 Restart Communications Option: The slave device serial line port
must be initialized and restarted, and all of its communication event
counters cleared. If the port is currently in Listen Only Mode, no
response is returned. If the port is not currently in Listen Only Mode,
a normal response is returned before the restart.
04 Force Listen Only Mode: Forces the addressed slave device to
Listen Only Mode. This isolates it from the other devices on the
network, allowing them to continue communicating without
interruption from the addressed remote device. No response is
returned. The only function that will be processed after this mode is
entered is the Restart Communications Option function (subcode
01).
Write Multiple
Holding Registers
10 (16)
Writes to the registers (1 to approximately 120 registers) in a slave
device.
Parameter sets, control, status and reference values are mapped as
holding registers.
Read/Write
Multiple Holding
Registers
17 (23)
Performs a combination of one read operation and one write
operation (function codes 03 and 10) in a single modbus
transaction. The write operation is performed before the read
operation.
Summary of Contents for ACS350 Series
Page 1: ...ACS350 User s Manual ACS350 Drives 0 37 22 kW 0 5 30 HP ...
Page 4: ......
Page 8: ...Safety 8 ...
Page 18: ...Table of contents 18 ...
Page 24: ...Hardware description 24 ...
Page 44: ...Installation checklist 44 ...
Page 56: ...Start up control with I O and ID Run 56 ...
Page 140: ...Program features 140 ...
Page 242: ...Actual signals and parameters 242 ...
Page 266: ...Fieldbus control with embedded fieldbus 266 ...
Page 284: ...Fault tracing 284 ...
Page 288: ...Maintenance and hardware diagnostics 288 ...
Page 309: ...Dimensions 309 Frame size R2 IP20 NEMA 1 3AFE68586658 A Frame size R2 IP20 NEMA 1 VAR EMC ...
Page 311: ...Dimensions 311 Frame size R3 IP20 NEMA 1 3AFE68579872 B Frame size R3 IP20 NEMA 1 VAR EMC ...
Page 313: ......