Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 178)

Chapter 8
8Ć17
block transfer modules in each I/O chassis
block transfer I/O channels
I/O chassis entries in the chassis scanning sequence list for each block
transfer I/O channel
active I/O channels per scanner
Figure 8.6
Diagram of PLCĆ3 I/O Channels
Active I/O channels
Block transfer I/O channels
Block transfer modules on each I/O
block transfer channel
I/O chassis on each block transfer I/O
channel (I/O chassis in rack list
Description Number Ch 1 Ch 2 Ch 3 Ch 4
3
2
7
5
0
0
1
2
0
0
Step 1 Ć Diagram the chassis connected in series to each channel (up to 4) of your scanner module. Then, fill in the information
called for below. Example values have been added.
1
2
3
4
1 1 2 1 2
0 0
1 0
Make inactive through processor LIST
Scanner
= I/O chassis
n = number of block
transfer modules
in chassis
A block transfer I/O channel is a channel that contains one or more block
transfer modules located in any chassis connected to the channel.
An I/O chassis can appear more than once in a chassis scanning sequence
list. Count it and the block transfer module(s) that it contains as often as
it is listed.
2. Step 2 - Using information from Figure 8.6, look up the nominal time
from the table in Figure 8.7.