Automationdirect.com DL06, User Manual

Page: 155 / 533

DL06 Micro PLC User Manual; 3rd Edition Rev. E
4–22
Chapter 4: System Design and Configuration
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
Network Master Operation (using MRX and MWX
Instructions)
This section describes how the DL06 can communicate on a MODBUS RTU network as a
master using the MRX and MWX read/write instructions. These instructions allow you to
enter native MODBUS addressing in your ladder logic program with no need to perform octal
to decimal conversions. MODBUS is a single master/multiple slave network. The master is the
only member of the network that can initiate requests on the network. This section teaches you
how to design the required ladder logic for network master operation.
MODBUS Function Codes Supported
The MODBUS function code determines whether the access is a read or a write, and whether
to access a single data point or a group of them. The DL06 supports the MODBUS function
codes described below.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
a
b
c
D
MODBUS Function Code Function DL06 Data Types Available
01 Read a group of coils Y, CR, T, CT
02 Read a group of inputs X, SP
05 Set / Reset a single coil (slave only) Y, CR, T, CT
15 Set / Reset a group of coils Y, CR, T, CT
03, 04 Read a value from one or more registers V
06 Write a value into a single register (slave only) V
07 Read Exception Status V
08 Diagnostics V
16 Write a value into a group of registers V
Slave #1 Slave #3
Master
MODBUS , RTU Protocol, or DirectNET ,
Slave #2
LOGIC
K oyo
06
C0 C4 C2 X1 X3 X4 X6 X11 X13 X14 X16 X21 X23 N.C.
C1 C3 X2 X5 X7 X10 X12 X15 X17 X20 X22 X0 N.C.
AC(N) 24V
0V
N.C.
C1 C3 Y0 Y15 Y12 Y10 Y17 Y7 Y5 Y2
C0 C2 Y16 Y14 Y13 Y11 Y6 Y4 Y3 Y1
LG G
AC(L)
D0-06DR
2.0A OUTPUT: 6-240V 50 - 60Hz 2.0A, 6 - 27V
INPUT: 12 - 24V 3 - 15mA
Y
X
40VA 50-60Hz PWR: 100-240V
0 1 2 3 4 5 6 7 10 11 12 13 14 15 16 17 20 21 22 23
PORT1 PORT2
TERM
RUN STOP
PWR
RUN
CPU
TX1
RX1
TX2
RX2