Chapter 12
92
Technical data
12.1.1
Calculation of the response times
The following table can be used to calculate the response times of corresponding
paths within the MELSEC-WS safety controller.
Evaluation
1. Inputs
Response time of the considered input in the
signal path
In1 or In2 or In3 or In4 (from table below)
2. Logic
a) Response time of CPU module logic
2 × logic execution time
*1
Delay through logic application
*2
(e.g. On- or Off-delay timer function block)
b) Response time of the routing (applies only for
output to network module)
No delay
0 ms
c) Response time of Fast shut off logic (applies
only for WS0-XTIO modules)
No delay
0 ms
3. Outputs
Response time of the considered output in the
signal path
Out1 or Out2 or Out3 or Out4 (from table
below)
Total response time
Occurrence
In1: Digital inputs
Out1: Digital outputs
General
Response time of the sensor
*3
Response time of the actuator
*3
General
Input processing time
6.5 ms Output processing time
a) From logic (via ): + 4.5 ms
b) From Fast Shut Off: + 1.5 ms
If On/Off filter enabled
+ min.
filter time
*4
If I1 … I8 is connected at
the test output X1… X8
+ Max. off-on delay
*1
of used test output
+ Long gap of used test output
*1
a) Safety mats and
bumpers
+ Test period
*1
of the test output. Use
the greater value of both test outputs.
b) Testable type 4
sensors (e.g. L41)
+ Test period
*1
of the test output.
c) All other sensors
+ Test gap
*1
of the test output
(if test gap
*1
is >1 ms)
Total In1
Total Out1
Occurrence
In2: Input from EFI device
Out2: Output to EFI device
If EFI functions are used
via SICK EFI-compatible
devices
Response time of the EFI data source (as
a rule a sensor) for external OSSDs via
EFI
*3
or Flexi Link remote station
Response time of the message receiver (e.g.
scanner with protective field switching via
EFI)
*3
Constant:
EFI cycle time of the EFI receiver
*3
a) Scanner (e.g. S3000) + 3.5 ms
+
24
ms
b) Light grid (e.g.
C4000, M4000)
+ 1.5 ms
+
4
ms
c) Flexi Link
+ 0.5 ms
+
4
ms
Total In2
Total Out2
Occurrence
In3: Network module — data from the
network
Out3: Network module — data to the network
General
Response time field bus for data input to
network module (e.g. from
programmable controller)
*3
Response time field bus for data from
network module (e.g. to programmable
controller)
*3
General
2 × internal update interval for data from
the network module to the CPU module
*5
2 × internal update interval for data from the
CPU module to the network module
*5
If 1 network module
+ 5 ms
+
8
ms
If 2 network modules
– 4 ms
–
4
ms
Total In3
Total Out3
Table 53:
Calculation of the response times of the MELSEC-WS safety controller in ms
*1 Take the values from the Setting and Monitoring Tool report.
*2 Time values have a tolerance of 10 ms, i.e. for each selected value 10 ms must be considered
additionally for the response time. E.g. for a 10 ms off delay, 20 ms must be used for the calculation.
*3 Take values from the corresponding manual.
*4 Switch off is delayed until the signal has been Low for at least the filter time selected. For WS0-XTIO
and WS0-XTDI firmware version
≤
V2.00 the filter time is fixed at 8 ms.
Summary of Contents for MELSEC-WS series
Page 1: ...Safety Controller User s Manual WS0 CPU0 WS0 CPU1 WS0 CPU3 WS0 XTDI WS0 XTIO WS0 4RO ...
Page 2: ......
Page 117: ...Chapter 14 114 Annex ...
Page 134: ...Chapter 14 131 Annex ...
Page 151: ......
