YASKAWA FSDrive-MV1000 Parameter Manual page 146

2.4 d: Reference Settings
When analog inputs are used, negative input values can be generated by
• applying negative voltage input signals.
• using positive analog input signals but setting the analog input bias to negative values so that the input value can be
negative.
• applying positive voltage input signals and using a contact input that is programmed for H1-
When MEMOBUS communication or a communication option card is used, only positive input values can be set.
■ Speed Limitation and Speed Limit Bias
The speed limit setting is read from the input selected in parameter d5-03. A bias can be added to this speed limit using
parameter d5-05 while parameter b5-08 determines how the speed limit bias is applied.
between these settings.
Table 2.17 Speed Limit, Speed Bias and Speed Limit Polarity Selection
Forward
Run Command
Positive
Torque Reference
Direction
(Forward)
Positive
Speed Limit
Direction
(Forward)
Normal Operation
Direction
Internal
Torque
Reference
Bidirectional Speed
Torque
Limit Bias
Limit
(d5-08 = 0)
<1>
Speed Limit
Bias
d5-05
Internal
Torque
Reference
Torque
Unidirectional
Limit
Speed Limit Bias
(d5-08 = 1)
<1>
Speed Limit
Bias
d5-05
Application Example Line Direction
<1> The value of Δn in the drawings depends on the ASR setting in parameters C5-
Indicating Operation at the Speed Limit
■
A contact output can be programmed to close when the drives is operating at or beyond the speed limit (H2-
Use this output to notify a PLC or some other control device of abnormal operating conditions.
146
Reverse Forward
Positive Negative
(Forward) (Reverse)
Negative Negative
(Reverse) (Reverse)
Forward
Torque
Speed Limit
Bias
d5-05
Torque
Limit
Speed
0
Torque
Speed
Limit
Limit
Speed Limit
Bias
d5-05
Torque
Δn
Torque
Limit
Speed
0
Torque
Speed
Limit
Limit
Δn
Winder
Speed Torque
Line Direction
M
Operating Conditions
Reverse Forward
Negative Negative
(Reverse) (Reverse)
Positive Positive
(Forward) (Forward)
Reverse
Torque
Speed Limit
Bias
Speed
d5-05
Limit
Torque
Limit
Speed
0
Torque
Internal
Limit
Torque
Reference
Internal
Torque
Reference
Torque
Speed Limit
Speed
Bias
Torque
Limit
d5-05
Limit
Speed
0
Torque
Limit
Internal
Torque
Reference
Torque
Speed Torque
M
.
YASKAWA ELECTRIC EZZ010930 FSDrive-MV1000 Parameter Guide
Table 2.17 explains the relation
Reverse Forward
Negative Positive
(Reverse) (Forward)
Negative Negative
(Reverse) (Reverse)
Forward
Torque
Speed Limit
Bias
Speed Limit
d5-05 Bias d5-05
Speed
Torque
Limit
Limit
Speed
0
Torque
Δn
Limit
Δn
d5-05
Torque
Speed Limit
Internal
Bias
Torque
d5-05
Reference
Torque
Speed Limit
Limit
Speed
0
Torque
Limit
Internal
Torque
Δn
Reference
Δn
Unwinder
Speed Torque Speed
Line Direction
M
= 78.
Reverse
Positive
(Forward)
Positive
(Forward)
Reverse
Torque
Internal
Δn
Torque
Δn
Reference
Speed Limit
Bias
d5-05
Speed
0
Torque
Speed
Limit
Limit
Torque
Δn
Δn
Speed
0
Torque
Speed
Limit
Limit
Speed Limit
Bias
d5-05
M Line Direction
= 32).