Eaton easy800, Руководство пользователя

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6 The network Net
6.3 Description of the NET-PARAMETERS
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Control Relay easy800 11/11 MN04902001Z-EN www.eaton.com
Pause time, changing the write repetition rate manually
(Station Menu BUSDELAY)
Default setting: Bus delay time = 0 (recommended setting that you should
only change for the reasons stated below).
In normal operation, the NET stations organize their data exchange
independently. The NET stations also determine the minimum delay time
required so that all messages can be sent.
Use BUS DELAY to change a multiplier that increases the bus delay time [tp]
between the transmission cycles of user data in the NET.
• A value 1 means that the bus delay time is doubled.
• A value 15 means that the bus delay time is increased tenfold.
▶
If necessary, use Í and Ú to set a multiplier of 1 - 15 and confirm your
selection with OK.
t
pnew
= t
p
x (1 + n)
t
pnew
= new bus delay time
t
p
= bus delay time determined by the network
n = Value at BUS DELAY
Even if a maximum baud rate is set, it may be necessary to increase the bus
delay time for the following reasons:
• In addition to the user data, additional data is transferred to the PC,
i.e.to easySoft-Pro in Online status or to an MFD in terminal mode.
• The transfer rate is low.
By increasing the bus delay time you increase the time window for online
services such as the power flow display, status display of actual values of
function block operands and the forcing of markers.
An increase of the bus delay time is only really necessary in the following
conditions:
• You use an MFD in terminal mode via the NET and see the message
“Connection establishment in progress...”. In this case the bus delay
time must be increased permanently.
• You wish to use the online services of the easySoft-Pro programming
software via the NET. In Communication View, however, you will receive
the error message “Device not responding”. This fault message appears
if you wish to establish an online connection or are already online. In this
case, a temporary increase of the bus delay time is useful. It should be
reduced after commissioning.
￫
All NET stations must have an identical bus delay time set.
This is achieved automatically if you carry out the NET
configuration via NET station 1
(
￫
section “Configuring NET”, page 94).