Frequency Command With Sign (Pr.541) - Mitsubishi Electric 800 Series Instruction Manual

7.8.4

Frequency command with sign (Pr.541)

By adding a sign to the frequency command value or the speed limit value, the start command (forward/reverse rotation) can
be inverted to start operation.
Select whether or not to use a sign for the frequency command value / speed limit value.
Pr.
541 Frequency command sign selection
Rotations per minute
(mechanical speed) setting
using Pr.37 and Pr.144
Not used
Used
• Relationship between the start command and sign (Pr.541 = "1")
Start command Sign of the frequency command
+
Forward rotation
-
+
Reverse rotation
-
Name
Pr.541
setting Sign
value
0 Not used 0 to 59000
1 Used -32768 to 32767 (complement of 2)
0 Not used 0 to 65535
1 Used -32768 to 32767 (complement of 2)
Actual operation command
Forward rotation
Reverse rotation
Reverse rotation
Forward rotation
Initial value Setting range
0 0, 1
Setting range
0 to 590.00 Hz
-327.68 to 327.67 Hz
Differs according to the Pr.37, Pr.144 and
Pr.811 settings.
(in 1 or 0.1 increments)
PPO TYPE SUPPORT SPECIFICATION
Actual frequency command
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