Rockwell Automation 1757-SWKIT4000 ProcessLogix R400.0 Installation and Upgrade Guide - Manual (Page 269)

Publication 1757-IN040B-EN-P - March 2002
Performance and Capacity Specifications 11-17
1757-PLX52 to 1757-PLX52 Communications
Performance per 1757-PLX52 50 ms 5 ms
Maximum Initiator Node Pull/Get Request Rate to all
target nodes. (ControlNet) 50 @ 100 ms
100 @ 200 ms
250 @ 500 ms
500 @ 1 sec 5 @ 10 ms
10 @ 20 ms
25 @ 50 ms
50 @ 100 ms
100 @ 200 ms
250 @ 500 ms
500 @ 1 sec
Maximum Initiator Node Pull/Get Request Rate to all
target nodes. (Ethernet) 250 @ 500 ms
500 @ 1 sec 250 @ 500 ms
500 @ 1 sec
Maximum Target Node Response Rate to Pull/Get
Requests from all initiator nodes. 500 PPS 500 PPS
Maximum Initiator Node Push/Store Request Rate to
all target nodes.* 50 PPS 50 PPS
Maximum Target Node Response Rate to Push/Store
Requests from all initiator node:
•
For Ethernet Supervisory LAN systems, the
maximum store rate is 500 msec.
50 PPS 50 PPS
*Currently the SCM Step is the only block type that can initiate peer push/store requests for
peer communications.
1757-PLX52 to PLC – Peer-to-Peer
Communications Capacity per 1757-PLX52 50 ms CEE 5 ms CEE
Maximum Number of Exchange REQUEST blocks per
1757-PLX52
32 32
Maximum Number of Exchange RESPONSE blocks per
1757-PLX52
32 32
Maximum Number of “active” Target Devices for
REQUEST blocks per 1757-PLX52.
•
1 DHRIO Module only counts as 1 Target
Device even when communicating with
multiple PLCs on either DH+ network
8 8
Maximum Number of DHRIO Modules per 1757-PLX52 2 2 (local chassis
only)
Table 11.J 1757-PLX52 Controller Communications Performance
1757-PLX52 Controller Communications Performance