4 – 36 Repair Manual RRE140/160/180/200/250 © BT
Functions and parameters
Operation and connection sequences
T-code Valid from serial number Date Publication No.
815, 816 6051502 2008-08-21 261828-040
Event: 7. Reverse braking
Previous event 4. Driving in fork direction
or
5. Driving in drive wheel direction
or
6. Braking in neutral
Action(s) The travel direction selector [B36] is moved to the position opposite to
the travel direction and input A1-X505:4 is changed from approximately
2.6 V to approximately 0.6 V or to approximately 4.7 V.
Contributing factors Operator parameter 5: Automatic braking.
Service parameter 201: Reversing
Resulting conditions The frequency of the drive motor three-phase voltage is reduced to
change the phase sequence when the motor is idling, and then
increases to a frequency in line with the amount the accelerator is
depressed.
Event: 8. Depressing the brake pedal
Previous event 4. Driving in fork direction
or
5. Driving in drive wheel direction
or
6. Braking in neutral
Action(s) The brake pedal [B32] is depressed and this affects inputs A5-X130:4 &
A5-X130:18 in that the voltage is increased at one of them and reduced
to a comparable degree at the other.
Contributing factors Operator parameter 5: Automatic braking.
Depressing the brake pedal.
Resulting conditions The frequency of the drive motor three-phase voltage is reduced.
When the brake pedal is depressed beyond 90 % of its possible travel:
The voltage at output A5-X131:20 is reduced and the mechanical brake
[Q1] is activated.
When stationary:
When the pedal is depressed for more than 5 % of its possible travel,
the voltage at output A5-X131:20 is reduced, and the mechanical brake
[Q1] is activated.
In terms of the support arm brake:
When the pedal is depressed 50 - 90 % of its possible travel, PWM out-
puts A5-X131:39 and A5-X131:12. are modulated so that the brakes
[Q16] and [Q17] are released.
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