ICC OPC-PRT3, Инструкция по эксплуатации, Страница: 24 / 115

ICC
23
3 INVERTER FUNCTION CODE SETTINGS
Depending on the desired operation of the overall application, the inverter function codes listed in Table
11 are important for proper operation of the end-to-end communication system. Although there may be
many other function codes that will require configuration for your specific application, it is important to
understand the manner in which the following function codes will impact successful control of the
inverter.

For further details regarding these function codes, please refer to the "FUNCTION CODES"
section in the applicable inverter
Instruction Manual , and RS-485 User's Manual (24A7-E-
0082) , Chapter 5, Section 5.2 "Data Formats."
Table 11: Function Code Settings Overview
Code Name
Setting
Range
Required
Value
Y98 Bus Link Function (Mode Selection) 0 to 3 3
3.1 Inverter Control-Related Settings
The following function codes relate to whether or not the inverter is to be controlled (command word
and/or frequency command) from the network, or whether the inverter will be locally-controlled (and
therefore only monitored and/or configured via the network.)
Bus Link Function (Mode Selection) (y98)
If the inverter is to be controlled from the network, then set the value of y98 to 3 (fieldbus option). A
setting of 3 for y98 may also be appropriate even if H30 is configured for an alternate (local) control
scheme.
When the inverter is controlled from the network, a selection of reference commands and monitor
parameters (S## and M## function codes as defined in Table 12) are available for controlling and
monitoring
the inverter’s speed. If multiple reference commands are being modified from the network,
then the interface card invokes a hierarchy to determine which reference is to be passed to the inverter
as its main reference command. This will also determine which monitor parameter is passed from the
inverter to the interface card as the main monitor parameter.
The S## and M## function code hierarchy is listed from highest to lowest priority in Table 12.
Table 12: S## and M## Function Code Hierarchy
S## Function Code M## Function Code Hierarchy Priority Description
S01 M06 Highest frequency / per-unit
S05 M09 2
nd
Highest frequency / Hz
S19 M79 3
rd
Highest speed
S02 M07 4
th
Highest torque
S03 M08 5
th
Highest torque current
S13 M73 Lowest PID
The highest-priority S## function code with a non-zero value will be used as the
inverter’s main
reference command. The corresponding M## function code should be monitored.