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Chapter 5: GS1 Modbus Communications
DL MRX/MWX Communication Program (continued)
This rung checks to see if it is time to communicate to slave 2, and also if there
are no current write requests to that drive. If not, it reads data from slave 2.
Drive #2
Speed Ref
Port Busy
Write Enable
SP116
C40
CTA2
K1
=
5
MRX
Drive #2
Drive #2
Direction, Fault, Reset Run CMD
Write Enable
Write Enable
C42
C41
CPU/DCM Slot:
CPU
Port Number:
K2
Slave Address:
K2
Function Code: 03 - Read Holding Registers
Start Slave Memory Address:
K48449
Start Master Memory Address:
V2020
Number of Elements:
K12
Modbus Data type:
584/984 Mode
Exception Response Buffer:
V5003
*** The following 21 rungs (6–26) are for slave 1 communications control. ***
This rung turns on C1 if there is a fault in drive #1.
V2000
K1
욷
6
Drive #1 Fault
C1
( SET )
This rung allows a switch on input X1 to reset the C bit used to indicate a drive #1 fault.
Drive #1 Fault Indication
Reset
X1
Drive #1 Fault
C1
( RST )
7
This rung turns on C2 if drive #1 has an overload fault.
V2000
K4
=
8
This rung allows a switch on input X2 to reset the overload fault bit C2.
Drive #1 Overload Indication
Reset
X2
9
Drive #1 OL
C2
( SET )
Drive #1 OL
C2
( RST )
(Continued next page)
2nd Edition
07/06/2011
GS1 Series AC Drive User Manual
5–39