Automation Direct DURApulse GS4 User Manual page 501

Before starting to control the drive or to write to critical parameters, you should ensure that you
are addressing the correct values. To check that your PLC is pointing to the correct location, read
and write from a non-critical parameter. A good example is P1.07, Acceleration Time 4. As you can
see in the Parameter Summary Table (partial from Ch 4 shown below), the Modbus address for
P1.07 is 0107H or 40264 decimal (The hex address = the parameter number).
Parameter Description
P1.06
Deceleration Time 3
P1.07 Acceleration Time 4
P1.08
Deceleration Time 4
*Decimal value is the Modbus address + hexidecimal value; 40001 + 263(0107H) = 40264).
In the GS4 keypad, change the default value of P1.07 from 10 to 9.97. Now read this value
with your PLC to verify your PLC addressing is correct. If your PLC reads back a value of 10,
use the keypad to change P1.06 to 9.96 and P1.08 to 9.98. Then try to read again. Remember,
some controllers use Base 0 and some use Base 1 addressing. So, you may need to offset your
addressing by 1. If you still have issues, please refer to the detailed Modbus information in
Chapter 5.
Once you have verified that your PLC addressing is correct, serial control for the drive is very
simple. Enter the following values to set up PLC Control RS485 for the drive:
MODBUS
Address
Parameter
HEX
P3.00 0300
P4.00
0400
Now when the REMOTE button is pressed, the drive will start via serial commands. The drive will
stop by either serial command or by pressing the STOP button on the keypad. (To return to full
keypad control, press the LOCAL button. The drive will Start and Stop with the keypad. Pressing
ENTER when the cursor is beside the "F" on the display, will allow the arrow keys to adjust the
drive output frequency).
DuRA
GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
pulse
Appendix D: Using GS4 AC Drives with AutomationDirect PLCs
Parameter Summary Table (Excerpt from Table in Ch4)
Range
P115=0: 000~60000 sec
P115=1: 00~600000 sec
P115=0: 000~60000 sec
P115=1: 00~600000 sec
P115=0: 000~60000 sec
P115=1: 00~600000 sec
Parameter Settings Table
Description
Decimal
Remote source of
40769
operation
Remote source of
41025
frequency
Run MODBUS Address
Read/
HEX Decimal*
Write
R/W 0106H 40263
R/W 0107H 40264
R/W 0108H 40265
Setting Value Note
This allows the RS-485 commands
3: RS-485, Keypad to start and stop the drive when
Stop enabled the REMOTE button is pressed
(drive is in REMOTE mode)
This allows the RS-485 commands
1: RS485 to set the drive speed when the
Communication REMOTE button is pressed (drive
is in REMOTE mode)
Settings
Default
1000
1000
1000
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