Download FB 217 F SFDOOR Safety Door Monitoring

FB 217 "F_SFDOOR": Safety Door Monitoring
Connections
Inputs
Outputs
Parameter
Data Type
Description
Default
IN1
BOOL
Input 1
0
IN2
BOOL
Input 2
0
QBAD_IN1
BOOL
QBAD or QBAD_I_xx signal of
F-I/O/channel of input IN1 (F-I/O)
0
QBAD_IN2
BOOL
QBAD or QBAD_I_xx signal of
F-I/O/channel of input IN2 (F-I/O)
0
OPEN_NEC
BOOL
1= Open necessary at startup
1
ACK_NEC
BOOL
1=Acknowledgment necessary
1
ACK
BOOL
Acknowledgment
0
Q
BOOL
1= Enable, safety door closed
0
ACK_REQ
BOOL
Acknowledgment request
0
DIAG
BYTE
Service information
B#16#0
Principle of Operation
This F-application block implements safety door monitoring.
Enable signal Q is reset to 0 as soon as one of the inputs IN1 or IN2 assumes a signal state of 0
(safety door is opened). The enable signal can be reset to 1, only if:
•
Inputs IN1 and IN2 both assume a signal state of 0 prior to opening the door (safety door has
been completely opened)
•
Inputs IN1 and IN2 then both assume a signal state of 1 (safety door is closed)
• An acknowledgment occurs
The acknowledgment for the enable takes place according to the parameter assignment at input
ACK_NEC:
•
If ACK_NEC = 0, the acknowledgment is automatic.
• If ACK_NEC = 1, you must use a rising edge at input ACK for acknowledging the enable.
Output ACK_REQ = 1 is used to signal that a user acknowledgment is required at input ACK for
the acknowledgment. The F-application block sets ACK_REQ = 1 as soon as the door is closed.
Following an acknowledgment, the F-application block resets ACK_REQ to 0.
In order for the F-application block to recognize whether inputs IN1 and IN2 are 0 merely due to
passivation of the associated F-I/O, you must supply inputs QBAD_IN1 or QBAD_IN2 with the
QBAD or QBAD_I_xx variable of the associated F-I/O or channel. This will prevent you from
having to open the safety door completely prior to an acknowledgment in the event the F-I/O are
passivated.
Warning
Variable ACK_NEC must not be assigned a value of 0 unless an automatic restart of the affected
process is otherwise excluded.
The F-application block supports the requirements of EN 954-1 and EN 1088.
Interconnection Example
You must interconnect the NC contact of position switch 1 of the safety door at input IN1 and the
NO contact of position switch 2 at input IN2. Position switch 1 must be mounted in such a way that
it is positively operated when the safety door is open. Position switch 2 must be mounted in such a
way that it is operated when the safety door is closed.
Startup Characteristics
After an F-system startup, enable signal Q is reset to 0. The acknowledgment for the enable takes
place according to the parameter assignment at inputs OPEN_NEC and ACK_NEC:
•
When OPEN_NEC = 0, an automatic acknowledgement occurs independently of ACK_NEC,
as soon as the two inputs IN1 and IN2 assume signal state 1 for the first time following
reintegration of the associated F-I/O (safety door is closed).
•
When OPEN_NEC = 1 or if at least one of the IN1 and IN2 inputs still has a signal state of 0
after reintegration of the associated F-I/O, an automatic acknowledgment occurs according to
ACK_NEC or you have to use a rising edge at input ACK for the enable. Prior to
acknowledgment, inputs IN1 and IN2 both have to assume a signal state of 0 (safety door has
been completely opened) followed by a signal state of 1 (safety door is closed).
Warning
Variable OPEN_NEC must not be assigned a value of 0 unless an automatic restart of the
affected process is otherwise excluded.
Output DIAG
The DIAG output provides non-fail-safe information on errors for service purposes. You can read
out this information by means of operator control and monitoring systems or, if applicable, you can
evaluate it in your standard user program.
Structure of DIAG
Bit
No.
Assignment
Possible Causes of
Problems
Remedies
Bit 0
Reserved
-
-
Bit 1
Signal state 0 is missing at
both IN1 and IN2 inputs
Safety door was not
completely opened when
OPEN_NEC = 1 after
F-system startup
Open safety door completely
Open safety door was not
completely opened
Open safety door completely
Wiring fault
Check wiring of position
switch
Position switch is defective
Check position switch
Position switch is incorrectly
adjusted
Adjust position switch properly
Safety door was not closed
Close safety door
Wiring fault
Check wiring of position
switch
Position switch is defective
Check position switch
Position switch is incorrectly
adjusted
Adjust position switch properly
Bit 2
Signal state 1 is missing at
both IN1 and IN2 inputs
Bit 3
QBAD_IN1 and/or QBAD_IN2
=1
F-I/O fault, channel fault, or
communication error, or
passivation by means of
PASS_On of F-I/O or channel
of IN1 and/or IN2
For a solution, see DIAG
variable, bits 0 to 6 in the
F-I/O DB section
Bit 4
Reserved
-
-
Bit 5
If enable is missing: input ACK
has a permanent signal state of
1
Acknowledgment button
defective
Check acknowledgment
button
Wiring fault
Check wiring of
acknowledgment button
Bit 6
Acknowledgement required
(= state of ACK_REQ)
-
-
Bit 7
State of output Q
-
-
Note
Access to the DIAG output is not permitted in the safety program!
See also
F-I/O DB
Passivation and Reintegration of F-I/O after F-System Startup