Create projects so that the total constant communication traffic of connected display units (master display unit, slave display units, GP-Viewer EX) does not exceed 8090. If the total constant communication traffic exceeds the upper limit, the slave unit attempting connection will be refused access. In addition, if the upper limit is exceeded by the master display unit only, slave display units cannot be connected.
Use the following process to check the total communication capacity while drawing.
Before calculating the communication traffic, first check the constant screen traffic volume on each screen. Performance may deteriorate if the traffic exceeds 475.
The constant screen traffic volume is the total number of addresses set to parts and D-Scripts. In the [Screen (S)] menu, select [Screen Information (I)], and you can view the number of addresses.
Constant screen traffic volume = [Addresses (parts)] + [Addresses (D-script)]
Calculate the constant communication traffic of each display unit.
Constant Communication Traffic = constant screen traffic + common settings constant communication traffic
Common settings constant communication traffic is the total number of addresses in the common settings for [Alarm Settings] (Basic), [Sampling Settings] (periodic interval, periodic interval while bit is ON, and bit change), [Sound Settings], [Extended Script] or [Global D-Script] instruction list, and Triggers (for example, Operation Log). To check that the common settings Constant Communication Traffic does not exceed 8090, run the error check and check the displayed error (error number: 1516).
Even if the actual constant screen traffic is less than 475, it is assumed to be 475 when calculating the constant communication traffic. Performance may deteriorate if the node communication traffic exceeds 475.
When calculating the constant communication traffic of GP-Viewer EX, do not include the Common Settings constant traffic.
Total the node communication traffic of all display units.
If the total node communication traffic exceeds 8090 (maximum constant communication traffic), reduce either the constant screen communication traffice or the number of addresses in the common settings.
You can check the constant communication traffic using the system variable (#H_EtherLink_ConstCommuniMemInfo) on the master display unit.