GFK-1322A
Chapter 4 Configuring the LBIM
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SCPT_max_rec_t
The configuration parameter SCPT_max_recv_time can be set by entering a value into
this field. The maximum receive time can be set in whole increments of one second.
This value is the maximum time period between updates of an input variable before a
fault is recognized. If the variable is set to 10 seconds and 11 second elapse since the last
update of the variable, then a fault is generated meaning that the sending node is
presumed to be off-line. The fault is signified by the setting of the valid bit associated
with the particular variable. To download this to the module, be sure to download the
“Value File” with the Download tool.
SCPT max_send_t
The configuration parameter SCPT_max_send_time can be set by entering a value into
this field. The maximum send time can be set in whole increments of one second. This
value is the maximum time period between updates of an output variable. If the variable
has not been sent to the network due to a change in value over the max_send_time
period, the variable is sent to the network even if the it has not changed since the last
update. This will allow other devices on the network to assure that the value they have is
current and that the LBIM is still online. Setting this parameter to zero (default) disables
the operation of this feature. To download this to the module, be sure to download the
“Value File” with the Download tool.
SCPT min_send_t
The configuration parameter SCPT_min_send_time can be set by entering a value into
this field. The minimum send time can be set in whole increments of one second. This
value is the minimum time period between updates of an output variable. If more than
one network update is requested for the variable within this time period, transmission is
inhibited until the time expires. This sets a minimum time between output transmissions
to avoid loading the network with rapidly changing data. Setting this parameter to zero
(default) disables the operation of this feature. To download this to the module, be sure to
download the “Value File” with the Download tool.
Note
Caution should be used in assigning the max send time. Setting many variables
to have short max send times can cause network performance problems. This
would cause many variables to be sent to the network rapidly and may overload
the network. Max_send_time should only be used when necessary for the
application and should be set to the highest period allowed by the application.
Summary of Contents for 90-30 PLC
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