Electrical systems – 5000 Functional description T-code 781
Valid from serial number 904519-
Date 2005-11-04
Order number 229735-040
Table 7: Theory of operation Event:
13. Support arms lowering
Prior event(s)
2 or 12
Action(s)
Press support arms lower button [A2:S22].
Influencing elements
Main contactor [K10]. Support arms lower button [A2:S22].
Resulting conditions
[A1:OUT.LOWER VALVE] goes {low}, lowering hydraulic valve [Y41] activates. [A1:OUT.SUPP.ARM VALVE] goes {low}, support arm selection valve [Y52] activates.
Event:
14. Click-2-creep (option)
Prior event(s)
2
Action(s)
“Double-operate” [L1] to activate function. Operate [L1] with tiller arm in upright position to drive truck at creep speed (2.5 km/h).
Influencing elements
Main contactor [K10]. Setting of parameter #15:0.
Resulting conditions
[A1:OUT.BRAKE A] goes {low}. Brake coil [Y1] energises, mechanical brake releases. Current fed to traction motor field winding (S2 +ve and S1 -ve). Pulsed current fed to traction motor armature proportional to butterfly deflection. “SLO” displayed (flashing).
Event:
15. Turtle (option)
Prior event(s)
3
Action(s)
Press [S113] to activate function. Move butterfly [L1] in either direction.
Influencing elements
Option button 1 [S113]. Setting of parameter #1 & #15:1.
Resulting conditions
[A1:OUT.BRAKE A] goes {low}. Brake coil [Y1] energises, mechanical brake releases. Current fed to traction motor field winding (S2 +ve and S1 -ve). Pulsed current fed to traction motor armature proportional to butterfly deflection. Maximum speed limited by parameter #1. “SLO” displayed (constantly on).
11- 20
Service Manual
7SM08F
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