![background image](http://html1.mh-extra.com/html/abb/acs880-x04/acs880-x04_firmware-manual_3389539553.webp)
Fieldbus control through the embedded fieldbus interface (EFB) 553
dedicated storage parameter (
and
),
which are available in the source selection parameters
and
Sending process PID feedback and setpoint values through EFB
The drive also has storage parameters for incoming process PID feedback (
) as well as a process PID setpoint (
). The feedback storage parameter is selectable in the source selection
parameters
and
.
The corresponding parameters in process PID control set 2 (group
) have the same selections.
Register addressing
The address field of Modbus requests for accessing holding registers is 16 bits. This
allows the Modbus protocol to support addressing of 65536 holding registers.
Historically, Modbus master devices used 5-digit decimal addresses from 40001 to
49999 to represent holding register addresses. The 5-digit decimal addressing limited
to 9999 the number of holding registers that could be addressed.
Modern Modbus master devices typically provide a means to access the full range of
65536 Modbus holding registers. One of these methods is to use 6-digit decimal
addresses from 400001 to 465536. This manual uses 6-digit decimal addressing to
represent Modbus holding register addresses.
Modbus master devices that are limited to the 5-digit decimal addressing may still
access registers 400001 to 409999 by using 5-digit decimal addresses 40001 to
49999. Registers 410000 to 465536 are inaccessible to these masters.
Note:
Register addresses of 32-bit parameters cannot be accessed by using 5-digit
register numbers.
Содержание ACS880-x04
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Страница 4: ......
Страница 18: ...18 Using the control panel ...
Страница 24: ...24 Control locations and operating modes ...
Страница 111: ...Application macros 111 Fieldbus control macro This application macro is not supported by the current firmware version ...
Страница 112: ...112 Application macros ...
Страница 496: ...496 Additional parameter data ...
Страница 544: ...544 Fault tracing ...
Страница 602: ...602 Control chain diagrams ...