Rockwell Automation 2711 PANELBUILDER SOFTWARE USER MANUAL - Manual (Page 385)

PLC Programming Considerations
Appendix A
A-21
Nominal Time
Use the table below to determine your “nominal time”. This will depend on
the number of channels (1–4) supporting block transfers, and the number
of active channels on the scanner.
Table A.F
Determining Nominal Time
No. of Channels
with Block Xfer
Devices
1 Active
Channel
2 Active
Channels
3 Active
Channels
4 Active
Channels
1 40 52 54 58
2 ĆĆ 67 68 76
3 ĆĆ ĆĆ 98 99
4 ĆĆ ĆĆ ĆĆ 123
Number of BT on Channel
This is the total number of block transfer devices on the scanner channel
that are enabled simultaneously.
Number of Chassis in Rack List
This is the total number of chassis that are connected to the scanner
channel.
Terminal Process Time
Terminal process time is less than 2.0 ms (typical) per dynamic object on
the screen being displayed.
In the following example, a color Keypad PanelView terminal is used to
control a pump and display its ON/OFF status and pressure. The pump is
connected to an output module and a pressure gauge is connected to an
analog input module. The system consists of:
a 1747–L524 processor (5/02) in slot 0
a 1747–SN scanner (RIO Scanner) in slot 1
an output module in slot 2
an analog input module in slot 3
SLC 5/02 Programming
Example