YASKAWA A1000 Technical Manual page 149

Current Input
Input terminal A2 can accept a current input signal. Refer to
Table 5.6 Analog Input Settings for Frequency Reference Using a Current Signal
Terminal Signal Level
Signal Level Selection
4 to 20 mA
A2
0 to 20 mA
Figure 5.2
Figure 5.2 Setting the Frequency Reference as a Current Signal to Terminal A2
DIP switch S1 must first be set for current input.
Switching between Main/Auxiliary Frequency References
The frequency reference input can be switched between the analog terminals A1, A2, and A3 using multi-speed inputs.
Refer to Multi-Step Speed Selection on page 198
Setting 2: MEMOBUS/Modbus Communications
This setting requires entering the frequency reference via the RS-485/422 serial communications port (control terminals
R+, R-, S+, and S-). Refer to
Setting 3: Option card
This setting requires entering the frequency reference via an option board plugged into connector CN5-A on the drive
control board. Consult the option board manual for instructions on integrating the drive with the communication system.
Note: If the frequency reference source is set for an option PCB (b1-01 = 3), but an option board is not installed, an oPE05 Operator
Programming Error will be displayed on the digital operator and the drive will not run.
Setting 4: Pulse Train Input
When b1-01 is set to 4, the frequency reference must be provided by a pulse train signal to terminal RP. Follow the
directions below to make sure the pulse train signal is working properly.
Verifying Pulse Train is Working Properly
• Make sure that b1-01 is set to 4 and H6-01 is set to 0.
• Set the pulse input scaling H6-02 to the pulse train frequency value that equals 100% of the frequency reference.
• Enter a pulse train signal to terminal RP and check if the correct frequency reference is displayed.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Parameter Settings
Function Selection
H3-09 = 2
H3-10 = 0
(Frequency Bias)
H3-09 = 3
DIP switch S1
V I
0 or 4 to 20 mA
for details on using this function.
MEMOBUS/Modbus Communications on page 545
Table 5.6 to set terminal A2 for current input.
Gain
H3-11
Drive
+V
10.5 V, 20 mA power supply
A1 Analog Input 1
A2 Analog Input 2
A3 Analog Input 3
AC Analog input common
-V -10.5 V, 20 mA power supply
5.2 b: Application
Notes
Bias
Make sure to set DIP switch S1 on the
H3-12
terminal board to "I" for current input.
for instructions.
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