Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 85)

Chapter
9
Chapter 9
Using the Parallel Port
Figure 9Table 9
9 – 1
Chapter 8
Using the Parallel Port
This chapter will provide you with:
•
A description of the Parallel Port.
•
Format requirements for the Message Variable/Slave Run Mode and
Message List Run Mode.
•
Data sampling methods.
•
DIP switch settings.
Note: This chapter is applicable only to the Parallel Port Versions of the
DL40.
The Parallel Port has connections for 4 strobe lines and 16 data lines.
Figure 9.1
Parallel Port Connections
PARALLEL PORT 5-24 VDC INPUT
D
15 D
14 D
13 D
12 D
11 D
10 D
9 D
8 D
7 D
6 D
5 D
4 D
3 D
2 D
1 D
0
M
S
3 M
S
2 M
S
1 M
S
0
ISO
+ 12V
ISO
GND
The four strobe lines (MS0–MS3) specify the type of information on the data
lines (D0–D15). For Message/Variable/Slave Run Mode, D0–D15 can
receive:
•
Message number to trigger
•
Slave address to which message will be sent
•
Variables to be placed in message
– 16 bit binary
– 4 digit signed BCD
– l digit unsigned BCD
– 1 character ASCII
For Message List Run Mode, D0–D15 can receive:
•
Priority msg. number to trigger (interrupts message list)
•
Message number to add to message list
•
Message number to delete from message list
Chapter Objectives
Description of the
Parallel Port