Toshiba T300MTX, Instruction Manual

Page: 58 / 140

IF08CZ10 April, 2019
- 36 -
INTERFACE (cont’d)
[Setting examples]
Example 1:
Analog speed reference is input to AIN1.
Set 0 to 100% (0 to 1.0) speed reference signal at 0 to +10 V so that it is stored in SP_REF1.
Use a personal computer with the maintenance tool installed for setting the parameters.
The input characteristic is shown in the following figure.
AIN1_TYPE = 1
AIN1_OS = 0
AIN1_AS = SP_REF_AIN1
AIN1_GS = (1.0 / 10 V) x 10 V
= 1.0
Input Characteristic Example
Example 2
When a 4~20 mA (0 to 100%) speed reference is input to AIN1, it is recommended
that a 4-20 mA / 0-10 VDC transducer be used. If the source is isolated, an internal 510 Ohm
burden resistor may also be used via a jumper on the brd.. This would give 2VDC at 4mA. In this
case, an offset would need to be set in the drive as follows:
AIN1_GS
= 2 / (20mA - 4mA) x 20mA = 2.5
AIN1_OS = -2.5 x 4mA / 20mA = -0.5
AIN1_AS = SP_REF_AIN1
AIN1_TYPE = 1