Fuji Electric OPC-PRT - Inverter Reaction to Network Timeout Conditions

21
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.
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For further details regarding these function codes, please refer to the FRENIC-Ace
Instruction Manual (INR-SI47-1733a-E), Chapter 5 "FUNCTION CODES", FRENIC-Ace
User’s Manual (24A7-E-0043E), “y codes: Link Functions”, 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 (S## function
codes as defined in Table 12) are available for controlling 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 referenc e command.
The S## function code hierarchy is listed from highest to lowest priority in Table 12.
Table 12: S## Function Code Hierarchy
S## Function Code
Hierarchy Priority
Description
S01
Highest
frequency reference / per-unit
S05
2
nd
Highest
frequency reference / Hz
S19
3
rd
Highest
speed command
S02
4
th
Highest
torque command
S03
5
th
Highest
torque current command
S13
Lowest
PID command
The highest-priority S## function code with a non-zero value will be used as the inverter’s main
reference command.