Rockwell Automation 440F MatGuard, 440F-C4000 Mat Controllers - Manual (Page 36)

Control unit - Mode of operation (440F-C28013)
Auto reset
On power up:
Power, auto reset and machine enabled LED’s illuminate.
When mat operated:
Machine enabled LED goes out
Stand off mat:
Machine enabled LED illuminates
Manual reset
On power up:
Power, manual reset and machine enabled LED’s illuminate.
Press reset button:
Machine enabled LED illuminates
When mat operated:
Machine enabled LED goes out
Stand off mat:
Machine enabled LED still out
Press reset button:
Machine enabled LED illuminates
Under fault condition
Machine enabled light goes out and will not allow reset until fault is rectified. In the fault condition if there
is a mat fault, one or more of the MAT STATUS LED’s will be illuminated. Under open circuit or short
circuit the LED(s) will illuminate RED. If there is a fault condition and none of the MAT STATUS LED’s
are illuminated then it is a control unit fault.
6.5 CHECKING THE SAFETY FUNCTIONS
6.5.1 SINGLE CHANNEL SYSTEMS (see figs. 15 and 17 section 5)
Simulate normal operation. Actuate the mat by standing on it and check that the main contactor drops
out immediately. Check that any other safety related stop functions e.g. brake, clutch contactors are
operating as intended.
6.5.2 DUAL CHANNEL SYSTEMS (see fig. 16 and 18 section 5)
1. Simulate normal operation. Actuate the mat by standing on it and check both final contactors drop out
immediately. Check that any other safety related stop functions e.g. brake/clutch contactors are
operating as intended.
2. Isolate the power source and then install a temporary fault by short circuiting terminals 13 and 14 at
terminal block 6 (figs. 26 or 27).
3. Reinstate the power source and actuate the sensor mat and check that one of the final contactors
drops out immediately and any other stop functions associated with that channel operate as intended.
4. CHECK CONTROL UNIT WILL NOT RESET
5. Isolate the power source and remove the temporary fault. Reinstate the power source and check mat
system operates normally. Taking the same electrical safety precautions, repeat the test with a temporary
short circuit across terminals 23 and 24 at terminal block 6 (figs. 26 or 27).
6. AGAIN CHECK CONTROL UNIT WILL NOT RESET
7. Remove the temporary fault, check mat system operates correctly.
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