© Feb. 2023
148 TB20J Plus Maintenance Manual
CONTROL SYSTEM
be set to a value that allows the action to just get
started, and it can be identified through the debug
mode.
• Maximum current: refers to the maximum current of
actions. If it is too low, the speed of actions will be af-
fected, and if it is too high (exceeding the full-open
current of the proportional valve), the buffering per-
formance of actions will be affected.
• Working proportion: refers to the starting buffer slope
of actions. The smaller the proportion value, the big-
ger the starting buffer slope and the shorter the time
required; the larger the proportion value, the smaller
the starting buffer slope and the longer the required
time. This parameter can be used to improve the
starting hysteresis and starting impact performance
of actions.
• Stopping proportion: refers to the stopping buffer
slope of actions. The smaller the proportion value,
the bigger the stopping buffer slope and the shorter
the time required; the larger the proportion value, the
smaller the stopping buffer slope and the longer the
time required. This parameter can be used to im-
prove the stopping hysteresis and stopping impact
performance of actions.
• Time proportion: omitted.
• Speed proportion: used to adjust the target current
of action buffering. The smaller the proportion value,
the lower the target current and the slower the ac-
tion; the larger the proportion value, the higher the
target current and the faster the action. This parame-
ter can be used to adjust the action speed in the buf-
fer zone.
Table 11-2 Description of items on PROPOR. CONFIG 4 interface
No. Item
Description
Applicable
models
1
MB Lift Down Inspect
(Down)
To set the time and speed proportion of main boom when
fully lowered during luffing-down.
Condition of fully lowering: down limit switch is triggered or
the main boom is positioned at an angle smaller than the
set value.
TB, AB
2
MB Lift Up Inspect (Up)
To set the time and speed proportion of main boom when
fully raised during luffing-up.
Condition of fully raising: up limit switch is triggered or the
main boom is positioned at an angle bigger than the set
value.
TB, AB
3
MB Lift Down Inspect
(Up)
To set the time and speed proportion of main boom when
fully raised during luffing-down.
Condition of fully raising: up limit switch is triggered or the
main boom is positioned at an angle bigger than the set
value.
TB, AB
4
MB Telescope
Detection (Extend)
To set the time and speed proportion of main boom when
fully extended.
Condition of fully extending: the extended length is bigger
than the set value.
TB
5
MB Telescope
Detection (Shrink)
To set the time and speed proportion of main boom when
fully retracted.
Condition of fully retracting: the retracting limit switch is
triggered or the extended length is smaller than the set
value.
TB, AB
6
TB Lift Down Inspect
(Down)
To set the time and speed proportion of articulated boom
when fully lowered during luffing-down.
Condition of fully lowering: down limit switch is triggered or
the articulated boom is positioned at an angle smaller than
the set value.
AB
7
TB Lift Up Inspect (Up)
To set the time and speed proportion of articulated boom
when fully raised during luffing-up.
Condition of fully raising: up limit switch is triggered or the
articulated boom is positioned at an angle bigger than the
set value.
AB
8
TB Lift Down Inspect
(Up)
To set the time and speed proportion of main boom when
fully raised during luffing-down.
AB
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