Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 314)

Publication 1760-UM002B-EN-P - March 2005
6-8 Pico-Link and Point-to-Point Serial Connections
Pause Time, Changing the Write Repetition Rate Manually
Every Pico-Link segment automatically determines the number of active
stations, the baud rate, and the total number of bytes which are transmitted.
The minimum pause time which a device requires is automatically determined
using this data to ensure that all devices can send their messages. If a pause
time is to be increased, the value of the BUSDELAY: must be set greater than
zero.
Value “1” doubles the pause time, value “15” will increase it by a factor of 16.
t
pnew
= t
p
x (1 + n)
t
pnew
= new pause time
t
p
= pause time determined by the network
n = value on BUSDELAY
IMPORTANT
An increase in the pause time means that fewer
messages (inputs, outputs, bit data, word data) are
transferred per time unit.
The reaction speed of the entire controller depends on
the baud rate, the pause time and the quantity of
transferred data.
The smaller the amount of data transferred, the faster
the reaction times of the system.
IMPORTANT
An increase in the pause time is only useful during
commissioning. To ensure that the data for the power
flow display is updated faster in the PC, a longer
range for this data is created on the network within
this pause time.