Installation and Upgrade Guide User guide

Publication 1757-IN032B-EN-P - April 2001
7-12 Performance and Capacity Specifications
Client/Server Communication Capacity
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
88
Maximum Number of DHRIO Modules per 1757-PLX52 2 2 (local chassis
only)
Table 7.L 1757-PLX52 Controller Communications Performance
Table 7.M Server communication NetBIOS session usage
Session type or activity Comment/example
Time Sync Active once every configured Time Sync period.
Shared Drives/ Displays Active continuously, if Station Client get displays from central Server.
Shared printer Active continuously if linked to a network printer for Reports, etc.
Server Redundancy Uses from 1-3 Server Sessions based upon User/Login Configuration
settings. (Also requires Time-Sync)
ER Server Active during ER Sync on Redundant Server if configured for ER
Server account.
Multi-User CB Active during Point Build (uses shared drive)
Snap-Shot Save & Restore Active during this operation (uses shared drive)
Table 7.N Server communication NetBIOS session capacity
Server Type Simultaneous NetBIOS sessions available
ProcessLogix Server on NT Workstation 10
ProcessLogix Server on NT Server Unlimited (See Microsoft license restrictions)