Meaning of safety chain leds and probable causes
LED MEANING PROBABLE CAUSES
TP12 – TP13 On:
internal 24 Vdc present
Off:
V1 power supply, fuse
F116
TP8 On:
Flash when the robot motors are switched on
Off:
failure to close contact
of relay K5 (SIM)
TP11 On:
DBU3 (DBU3-2) dynamic braking OK and power
contactors K101/K102 (K121/ K122) OK
Off:
DBU3 (DBU3-2) dy
-
namic braking or auxil
-
iary contacts of K101
K102 (K121/K122)
open
TP20 On:
Indicates DRIVE ON ENABLE
Off:
relay K6 (SIM)
TP21 On:
safety flange and robot 1 alarm OK
Off:
safety flange or robot 1
alarm, relay K2-K3
(SIM)
TP30 On:
safety flange and robot 2 alarm if present OK
Off:
safety flange or robot 2
alarm, relay K7-K8
(SIM)
TP22 – TP23 On:
Control unit OK (electronics on)
Off:
relay K9 (SIM)
TP24 – TP25 On:
safety relay on RBC2 module OK
Off:
safety relay on RBC2
module
TP26 – TP27 On:
safety relay on SCC2 and SAU2 module OK
Off:
safety relay on SCC2
and/or SAU2 module
TP31 – TP32 On:
safety relay on SCC2 and SAU2 module machine 2 if
present OK
Off:
safety relay on SCC2
and/or SAU2 module
machine 2
C3G Plus MAINTENANCE
01/0498 7-33
diagnostic
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