Status outputs, Led display elements, Response time – Rockwell Automation 440R MSR42 Control Module User Manual User Manual
Page 6: General, Original instructions
 
4
Light Curtain Multi-Function Control Module User Manual
Original instructions
Status outputs
The MSR42 base module has two status outputs (“Info1” and “Info2”). 
The logic of these two outputs depends on the configuration. A 
description of these outputs is given in the configuration control 
document. The following table shows the logic of the two status outputs 
for the basic configuration. The state of the status outputs will also be 
displayed through LED, visible on the front side of the main module.
Table 1
LED display elements
Table 2 gives information about the LED on the front side of a MSR42 
control unit with the basic configuration:
Table 2
Response time
General
The response time of a MSR42 main module depends on the 
configuration.
The relevant maximum response times for the MSR42 control module, 
with respect to a specific Micro 400 light curtain and MSR45E expander 
module, as well as a specific safety component may be calculated using 
the formulas below. 
The response time may be increased if a stop delay time t(delay) is 
configured for a safety component or a Micro 400 light curtain. During 
this delay, all start impulses are ignored. The safety outputs will switch 
off at the end of this delay period. 
The controller is shipped with the double scan filter. Single scan filter can 
be selected to reduce the response time. The relevant times may be found 
in the corresponding configuration control document (e.g. see 
configuration software manual).
If authorized personnel reconfigure the 
control module using the USB/optical 
interface, then depending on the 
configuration the response time or the 
stop delay time t(delay) may increase. So 
it is very important that after every new 
configuration. 
a. the configuration change label 
(page 13) is placed on the control 
module and
b. the new response time is confirmed to
be within the limits given by the risk 
analysis of the machine and
c. All relevant data of the actual
configuration are always described in 
the actual configuration control 
document for that controller. Make 
sure that the actual document is 
always stored near to the control unit.
d. Using the blanking mode, the
resolution of the Micro 400 will be 
reduced. Label the Micro 400 with the 
new resolution. A label is supplied 
with the Micro 400 light curtain 
mounting kit.
Terminal (LED)
Output "high" (+24 V)
Output "low" (0 V)
Info1 (LED)
Start ok (green)
No start possible (red)
Info2 (LED)
System okay (green)
Error (Lock out) (red)
These outputs may not perform any 
safety relevant functions. They are 
diagnostic outputs which provide status 
to a machine controller.
LED
Signal / Color /Status
Signal / Color /Status
Lamp
Orange / muting or blanking 
activated
Off / muting or blanking not 
activated
GPIO4
+24 V / green / automatic 
start
0 V / off / manual start
GPIO3
+24 V / green / manual start 
signal high or automatic start
0 V / off / manual start
GPIO2
+24 V / green / Teach-in 
Blanking active
0 V / off / Teach-in Blanking 
inactive
GPIO1
+24 V / green / Teach-in 
Blanking active
0 V / off / Teach-in Blanking 
inactive
OSSD2
+24 V / green / Micro 400 not 
Activated
0 V / red / Micro 400 activated 
(e.g. interrupted)
OSSD1
+24 V / green / Micro 400 not 
Activated
0 V / red / Micro 400 activated 
(e.g. interrupted)
Info2 (LED)
See page 4
See page 4
Info1 (LED)
See page 4
See page 4
IN2
+24 V / green / start release 
okay
0 V / red / no start release 
signal
IN 1
+24 V / green / no test
0 V / red / test
0 V
-
-
+24 V
+24 V / green / power 
connected
0 V / off / no power 
connected
Terminology
t(C)
Response time for the MSR42 control module (evaluation time), 
without light curtain evaluation time
t(LC)
Response time of the light curtain
t(delay)
Stop delay time for the outputs
t(em)
Response time for the MSR45E expansion module
t(GPIO)
Evaluation time for the safety component (GPIO filter time)
t(SCext)
Response time of the external safety component (e.g. Safe4)
t(totLCOSSD)
Maximum OSSD response time triggered by the light curtain
t(totLCEXT)
Maximum relay extension module response time for the light curtain
t(totSCOSSD)
Maximum OSSD response time for the safety components on GPIO