If the total communications traffic of the connected display unit exceeds the upper limit of the maximum constant communications traffic, the slave that has attempted 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.
Create project date considering data traffic.
For the upper limit of data traffic and how to calculate it, refer to the following.
7.5.2 Procedure - How to Calculate the Communication Traffic
Create screens so that the total of continual communication traffic of all of the screens will not exceed 8090. If the total continual communication traffic exceeds the upper limit, the slave that has attempted 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.
Ensure that the total of the number of parts addresses and the number of device addresses is 475 or less. An excessive load will be placed on the Master, which may cause errors and/or access failure.
The following PLCs are not supported.
Fuji Electric FA Components & Systems Co., Ltd. MICREX-SX Series SIO
Rockwell Automation, Inc. EtherNet/IP ControlLogix/CompactLogix Series Native
The Pass-Through feature, Device Monitor feature, Ladder Monitor feature, and Extended Script cannot be used on Slave display units. If you would like to share values obtained using Extended Script on a Master with slaves, select Memory Link for a device/PLC and expand the Extended Script used in Master display unit with a Memory Link to share it with the slave display units.
Network project files are not loaded on slave display units. Therefore, the distribution/collection feature of Pro-Server EX cannot be used. Also, device address values of PLCs cannot be read with Device Monitor, Symbol Monitor and API of Pro-Server EX. Device address values of internal devices (USR, LS) can be read.
Because Slave display units do not directly communicate with the PLC, the display unit cannot read communication error information in system variables or the LS area.
Slave display units reference device/PLC connected to the Master display unit, which is the same when using Memory Link. As a result, when using Memory Link the Slave display unit cannot access the following areas to diagnose and control the status of Slave display units.
#MEMLINK 0000 to 0019 (System Data Area)
#MEMLINK 2032 to 2095 (Special Relay Area)
#MEMLINK 9000 to 9999 (9000 Area)