Mitsubishi MELSEC-WS series, User Manual

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Chapter 4
60
Connecting devices
EMC measures
To increase the EMC resistance of the EFI communication, it is recommended to
connect the EFI cable shield on one or both sides to functional earth.
Connect this shield to the same DIN mounting rail to which the functional earth (FE) of
the MELSEC-WS safety controller is connected in order to minimize interferences on
the EFI cable. The connection of the shield to FE should be close to the cable inlet of
the control cabinet.
 The FE terminal of the MELSEC-WS safety controller is located at the bottom of the
housing and connects automatically to the DIN mounting rail when the module is
mounted.
 To avoid further interferences, the functional earth of the SICK sensors (e.g.
M4000, S3000) must be connected to the EFI shield as well.
 If other cables are present within the same cable duct where the EFI cable is routed
and these cables emit a high degree of EMC interference (drives or motor related),
this can lead to availability problems in the application. In this case, it is
recommended to install the EFI cable in a separate duct.
4.7 Flexi Link
4.7.1 Flexi Link overview
Flexi Link allows you to combine up to four Flexi Link stations via EFI for safe data
communication. Only modules from WS0-CPU1 or WS0-CPU3 can be used in a Flexi
Link system. The connection of WS0-CPU0 modules is not possible.
The process data of each station (inputs and outputs, logic results etc.) can be made
available to all other stations in the Flexi Link system. The Teach function allows to
temporarily deactivate single stations without impairing the function of the overall
system.
Features
 safe connection of up to four Flexi Link stations via EFI.
 connection via EFI1 or EFI1 and EFI2.
 transfer/receive up to 52 bit of information per station (26 bit per EFI channel).
 Each bit can be assigned a global tag name.
 Teaching simulates the presence of temporarily suspended (switched off) stations.
 Any station can be used as access point to address and configure the entire system
with the Setting and Monitoring Tool.
 The configuration of the entire Flexi Link system is stored in a single project file.
The Flexi Link system can be connected using only EFI1 or using both EFI1 and EFI2.
The overall number of process data bits per station that can be made available to the
other stations in the Flexi Link system depends on the connection method:
Connection method Available process data bits per station
EFI1 26
EFI1/EFI2 52
You can not use Flexi Link and EFI communication at the same time, i.e. it is not
possible to connect other SICK EFI-compatible devices on the EFI2 connection while
EFI1 is used for Flexi Link.
Note
Table 46:
Available process data bits
depending on the
connection method
Note