YASKAWA HV600 Technical Reference page 188

Ac drive bypass for hvac fan and pump applications
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5.2 b: Application
• Current Input
Refer to
Table 5.19
to use a current signal input to one of the MFAI terminals.
Terminal
Signal Level
Bypass MFAI
4 - 20 mA
0 - 20 mA
Figure 5.2 Example of Setting the Frequency Reference with a Current Signal to the Bypass MFAI
Changing between Master and Auxiliary Frequency References
2 : Serial Communications
The bypass uses serial communications to enter the frequency reference.
3 : Option PCB
The bypass uses a communications option card or input option card connected to the bypass control board to enter the
Run command.
Note:
If b1-01 = 3, but you did not connect a communications option card, oPE05 [Run Cmd/Freq Ref Source Sel Err] will flash on the keypad.
b1-02: Run Command Selection 1
No.
Name
(Hex.)
b1-02
Run Command Selection 1
(0181)
0 : Keypad
The bypass uses the keypad to enter the Run command.
Note:
The
on the keypad is on while keypad is the Run command source.
1 : Digital Input
The bypass uses the control circuit terminals to enter the Run command. Select the input method for the Run
command with an Z2-xx parameter.
Set Z2-xx = 21, 37 [Run (AUTO), Run Reverse (AUTO)].
• 2-wire Sequence
When you set A1-03 = 2220 [Initialize Parameters = 2-Wire Initialization] , it will initialize the bypass and set Z2-
01 = 21 [Run FWD]. Run Reverse is not set by default.
2 : Serial Communications
The bypass uses serial communications to enter the Run command.
3 : Option PCB
188
Table 5.19 Frequency Reference Current Input
Parameter Settings
Signal Level Selection
Z2-30 = 2
Z2-30 = 3
Sets the input method for the Run command.
Gain
Bias
Z2-32
Z2-33
Description
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Note
Set Jumper Switch S2 to "I" for current
input.
Default
(Range)
7
(0 - 9)

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