Mitsubishi Electric MELSEC Q Series User Manual page 88

4
FUNCTION
(1) Tags used for Class3 Tag communication
Class3 Tag
QCPU
1)
[ SET Y0 ]
Device
5)
4
- 12 4.2 Tag Communication Function
4.2.2 Class3 Tag communication
The following tags are used for Class3 Tag communication.
Tag
Originator
Target
(a) Read request
EtherNet/IP module
(request source)
Originator
Class3 Tag (Read)
Class3/UCMM Input Area
(Un\G4096 to Un\G8191)
Figure 4.11 Tags used for Class3 Tag communication (read request)
1) The Tag communication start request (Y00) is set to on.
A connection is established.
2) Device data are stored in the Class3/UCMM Output Area (Un\G12288 to
Un\G16383).
3) A read request is sent.
( (2) Timing of the Class3 Tag communication in this section)
Whether communication is normal or not can be checked in the following.
• The Communication Status (Class3/UCMM)(Un\G27184 to Un\G27199) is
on.
• The Communication Error (Class3/UCMM)(Un\G27200 to Un\G27215) is
off.
4) Tag data are read out.
5) Data in the Class3/UCMM Input Area (Un\G4096 to Un\G8191) are stored in
the device.
POINT
When Extension Class3/UCMM Output Area is used, the steps 2) and 4) above
are performed by the auto refresh. (
window)
Table 4.5 Tag type
Sends a read request to a tag of the target device.
Read
(Reads the data from the Tag of the corresponding device.)
Sends a write request to a tag of the target device.
Write
(Writes data to a tag of the target device.)
Read Accepts a read request from the target device.
Write Accepts a write request from the target device.
EtherNet/IP module
(request target)
1)
Connection
establishment
Target
3)
Class3 Tag (Read)
Class3/UCMM Output Area
(Un\G12288 to Un\G16383)
4)
Section 7.9.7 "Refresh Parameter"
Description
QCPU
1)
[ SET Y0 ]
Device
2)