Beckhoff TwinSAFE logic FB User Manual

Function blocks
196 Function blocks for TwinSAFE logic components
3.27.2.1 Diagnostic and state information for the FB SLI
Table 3-168: Diagnostic information
Value
Description
0
no diagnostic information
1
Underflow (PositionDiff < -NegLimit)
2
Overflow (PositionDiff > PosLimit)
Table 3-169: Diag Message
Text ID
Meaning
Parameter 1
Parameter 2
Parameter 3
0x40C0
An underflow has occurred
FB instance
Position
LatchPosition
0x40C1
An overflow has occurred
FB instance
Position
LatchPosition
Table 3-170: State information
Value
Description
1
RUN
In RUN state the FB SLI module determines the PositionDiff and checks whether
-NegLimit <= PositionDiff <= PosLimit applies.
The outputs assume the following values:
Error=0
SLIActive=1
PositionDiff = Position - LatchPosition
2
STOP
The FB SLI module assumes the STOP state if the input FbRun is FALSE.
The outputs assume the following values:
Error=0
SLIActive=0
PositionDiff = 0
3
SAFE
If the SLI input is FALSE, the FB SLI module assumes the SAFE state.
The outputs assume the following values:
Error=0
SLIActive=0
PositionDiff = 0
4
ERROR
If the FB SLI module detects an error when checking the permitted range for the
PositionDiff, the FB SLI module switches to the ERROR state and transmits the
corresponding Diag message to the GROUP module.
The outputs assume the following values:
Error=1
SLIActive=0
PositionDiff = 0
5
RESET
The FB SLI module assumes the RESET state if no further error is pending after an error
has occurred and the ErrAck input of the corresponding group is set to TRUE. The FB SLI
module should not exit the RESET state until ErrAck is FALSE and SLI is FALSE.
The outputs assume the following values:
Error=0
SLIActive=0
PositionDiff = 0

Beckhoff TwinSAFE logic FB Specifications

General

Brand	Beckhoff
Model	TwinSAFE logic FB
Category	Industrial Electrical
Language	English