Rockwell Automation 2711 PANELBUILDER SOFTWARE USER MANUAL - Manual (Page 380)

PLC Programming Considerations
Appendix A
A-16
Table A.A
Typical Program Scan Times
БББББББ
БББББББ
PLCĆ2/30
ББББББББ
ББББББББ
1772ĆLP1, LP2, LP3
БББ
БББ
5
ББББ
ББББ
ms/k
БББББББ
БББББББ
PLCĆ3
ББББББББ
ББББББББ
1775ĆL2
БББ
БББ
2.5
ББББ
ББББ
ms/k
БББББББ
БББББББ
PLCĆ3/10
ББББББББ
ББББББББ
1775ĆLP4, LP8
БББ
БББ
2.5
ББББ
ББББ
ms/k
БББББББ
БББББББ
PLCĆ5/15
ББББББББ
ББББББББ
БББ
БББ
2
ББББ
ББББ
ms/k
I/O Scan Time
This depends on the type of processor/scanner and number of I/O chassis
on the same scanner channel. Refer to the applicable PLC controller or I/O
scanner user’s manual. Typical Discrete I/O scan times are as follows :
Table A.B
Discrete I/O Scan Times
ББББББББББ
Б ББББББББ Б
ББББББББББ
PLCĆ2/30, (1772Ć SD, SD2)
1771ĆSN
PLCĆ5/15
ББББББББ
Б ББББББ Б
ББББББББ
7 ms / chassis
ББББББББББ
Б ББББББББ Б
ББББББББББ
PLCĆ3
PLCĆ3/10
ББББББББ
Б ББББББ Б
ББББББББ
6 ms / chassis
on same channel
For the PLC-2/30, also include the synchronous “program I/O scan time”
which is typically .5 ms per local I/O rack.
Terminal Process Time
The terminal process time is the display update time, and it depends on
which screen is being displayed. Typically, the update time will be less
than 2 ms per dynamic object on the screen being displayed. If the alarm
window is enabled and is scanning a large bit file, the display update time
may increase slightly.
Block Transfer Timing Considerations
Block Transfer timing depends on the specific processor type and I/O
configuration. Refer to your PLC user’s manual for specific block transfer
information.
Typically, the equations provided in this section will not be necessary.
However, when response time is critical, or many block transfer devices
are used in an application, this section can be used as a guideline.