Dl Rx/Wx Communication Program - For Dl05, D2-250(-1), D4-450 - AutomationDirect DURAPULSE Series User Manual

Chapter 5: DURA
DL RX/WX Communication Program – for DL05, D2-250(-1), D4-450
This program is for illustrational purposes only, and is not intended for a true application.
This rung counts the number of times the PLC attempts to communicate to the drive.
Port Busy
SP116
1
CT0
This rung counts the number of times an attempted communication to the drive fails.
Port Comm Fail
SP117
2
CT1
This rung acts as an alternator, allowing the following logic to alternate between
communicating to slave 1 or slave 2. If there were additional slaves, the 'K' number
for the counter would simply be increased to match the number of slaves in the system.
Port Busy
SP116
3
CT2
This rung checks to see if it is time to communicate to slave 1, and also if there
are no current write requests to that drive. If not, it reads data from slave 1.
Port Busy
SP116
4
(Continued next page)
5–54 DURA
PULSE
PULSE MODBUS Communications
Write Enable
CTA2 K0
=
Drive #1
Direction, Fault, Reset
Write Enable
Write Enable
C11
AC Drive User Manual
Drive #1
Speed Ref
C10
Drive #1
Run CMD
C12
CNT
CT0
K9999
CNT
CT1
K9999
CNT
CT2
K2
(Slave #1)
LD
Kf201
LD
K30
LDA
O2000
RX
V20400
1st Ed. Rev. D 05/2013