ABB AC500-S Safety User Manual page 200

Configuration and programming
AC500-S libraries > SafetyBlocks_PLCopen_AC500_v22.lib
DiagCode
8014
8005
4.6.4.3 SF_Antivalent
Standards Requirements
EN 954-1:1996 6.2 General safety principles, Idle current
6.2 Error detection for category 3 und 4
This function block converts two antivalent BOOL inputs (NO/NC pair) to one BOOL output with
discrepancy time monitoring. This FB should not be used stand-alone since it has no restart
interlock. It is required to connect the output to other safety FBs.
Table 24: FB name: SF_Antivalent
Name Data type
VAR_INPUT
Activate BOOL
S_ChannelNC BOOL
S_ChannelNO BOOL
DiscrepancyTime TIME
200
State name State description and output setting
Wait for Channel B has been switched to TRUE - waiting for channel A;
Channel A discrepancy timer started.
Ready = TRUE
S_EquivalentOut = FALSE
Error = FALSE
From Active One channel has been switched to FALSE; waiting for the second
Wait channel to be switched to FALSE, discrepancy timer started.
Ready = TRUE
S_EquivalentOut = FALSE
Error = FALSE
Initial value
FALSE
FALSE
TRUE
T#0ms
3ADR025091M0208, 12, en_US
Description, parameter values
Ä Table 16 "General input parameters" on page 192
Variable. NC stands for normally closed.
Input for NC connection.
FALSE: NC contact open.
TRUE: NC contact closed.
Variable. NO stands for normally open.
Input for NO connection.
FALSE: NO contact open
TRUE: NO contact closed
Constant.
Maximum monitoring time for discrepancy status of
both inputs.
2020/06/19