Hitachi L100 IP Series, Инструкция по эксплуатации

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Chapter 12 – Wiring examples
12-2
Inverter operation using analog set value
Connection diagram
AT
Motor thermistor
(PTC)
Set value
(4...20mA)
R
eve
rs
e r
un
Fo
rw
ar
d r
un
24VDC
Configuration of parameters
Function
Configurable
parameters
Description
A 01 01 Set value input using control terminals
A 02 01 Running command using terminals FW/RV
F 02 10 Acceleration time in s
F 03 10 Deceleration time in s
C 01 00 FW: Forward running command on digital input 1
C 02 01 RV: Reverse running command on digital input 2
C 03 16 AT: Use current input for set value (4 – 20mA)
C 05 19 PTC: Thermistor on digital input 5
Function description
The inputs 1 and 2 are used exactly the way as described in the previous example.
Digital input 3 (configured as AT) can be used to switch from voltage set value (0–
10V) to current set value (4–20mA). If none of the digital inputs has been configured
as AT then the voltage set value present on terminal O and the current set value
present on terminal OI will be added.
Instead of a fixed wiring or one that uses a switch connected to terminal 3 function
A 13 can be set to 01 (digital input 3 will then be configured as normally closed
contact).
This wiring example also incorporates a thermal motor protection using a thermistor.
It is important here that a screened control cable is used and that the thermistor
cables are installed at a safe distance from the motor cables. However, the screening
must only be grounded on the inverter side.