Beckhoff KL85 Series, Документация

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Programming in TwinCAT
KL85xx und KL9309 49 Version: 2.1.0
4.2.4 KL8548
Function blocks Description
FB_KL8548 [
}
49]
Function block for configuration of the KL8548, for reading out the digital signals and
for setting the outputs/LEDs.
4.2.4.1 FB_KL8548
Fig. 29: Function block FB_KL8548
Application
This function block is used to configure the KL8548 [
}
18] , to read out the digital signals and to set the
outputs/LEDs.
The function block must be called once per cycle.
The parameters are transferred to the terminal with a positive edge on bExecCfg .
The standard function [
}
60] of the LEDs cannot be deactivated.
VAR_INPUT
bEn : BOOL;
bExecCfg : BOOL;
bDisWatchdog : BOOL;
bEnEcoMode : BOOL;
bEnPwrOnVal : BOOL;
wPwrOnVal : WORD;
wOut : WORD;
dwOpt : DWORD;
bEn: The function block is enabled by setting bEn to TRUE in the PLC program. With bEn = FALSE the
execution of the function block will be stopped and all outputs reset.
bExecCfg: The configurations bDisWatchdog , bEnEcoMode , bEnPwrOnVal and wPwrOnVal are written to
the terminals when a positive edge is encountered. bBusy goes TRUE. Note that the inputs are not updated
during this time.
bDisWatchdog: Configuration: If False the last value of wStaOut remains unchanged in the event of a K-bus
error (the value is set to 0 if the PLC stops). If TRUE and bEnPwrOnVal = FALSE, the output goes to 0 in the
event of a K-bus error (or PLC stopped). If TRUE and bEnPwrOnVal = TRUE, the output adopts the value of
wPwrOnVal in the event of a K-bus error (or PLC stopped).
bEnEcoMode: Configuration: Full Scale Mode [
}
60] or ECO Mode [
}
60] . TRUE: ECO Mode. FALSE: Full
Scale Mode.
bEnPwrOnVal: Configuration: TRUE: In the event of a K-bus error (or PLC stopped), the analog output is
set to the value of wPowerOnValue if bDisWatchdog = TRUE.
wPwrOnVal: Configuration: Value that the output is to adopt in the event of a K-bus error (or PLC stopped).
wOut: Value of the analog output signal, provided that the switch is set to "auto". 0 V = 0000
hex
= 0
dec
, 10 V =
7FFF
hex
= 32767
dec
. If the switch is set to "man" the value of the potentiometer is output.