Rockwell Automation 999 IMC S Class Compact Motion Controller (Cat. No. 4100-999-122) - Manual (Page 99)

Understanding IMC-S/23x Setups 5-19
Publication 999-122 - January 1997
If your application does not use or require a runtime display while
operating, answer
NO to the Runtime Display? question.
Like the operator interface, the runtime display can also be configured
to operate off either serial port. If you are using DH-485 and select port
B, the runtime display is automatically disabled and the message
is displayed. If your application uses serial port B for another function
(such as the master controller in Multidrop), answer A to the
Runtime
Display Serial Port? question to place the runtime display on
serial port A. Since direct command mode always uses serial port A, if
you configure the runtime display for use on serial port A also, use the
ESC (Escape) key to toggle between the two modes.
The runtime display (if enabled) is continuously updated as part of the
Standard Operator Interface as well as during execution of the
application program. The rate at which the display is updated is
determined by the Display Refresh parameter. For most reasonably fast
display devices, the recommended value of 0.5 seconds should be used.
If your display device cannot respond to updates every half second, the
screen may become garbled or the data may noticeably lag behind
reality. In this case, increase the display refresh time to allow time for
the display to catch up. Due to the response time of the human eye,
display refresh times less than 0.2 seconds are rarely effective and
generally result in an unreadable display–especially with quickly
changing values.
!
ATTENTION: Always disable the runtime display if
you are using DH-485 communications.
Runtime Display Serial Port? B
DH-485 Communications Uses Port B:
Runtime Display Disabled!