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Programless Communications Section 5-1
■ Programless Upload/Download Settings
• Use the EST2-2C-MV3 CX-Thermo Support Software to make the set-
tings.
• The parameters for the following variable types can be set. Up to 300 set-
tings can be made.
• Parameters can be set to Not used to reserve words for future use.
Note The words set to Not used cannot be used for any other purpose
except the programless function.
• Only channels 1 and 2 can be set for TC2 Units.
• Unit numbers can be between 0 and 31, but one HFU can manage only
up to 16 Basic Units.
CX-Thermo Programless Upload Settings: Setting Screen
!Caution • There are 304 programless upload and 304 programless download set-
tings, which are linked to data to the PLC memory, from the start address
to the end code (00FF). Always set an end code at the end of linked data,
because all 304 pieces of data will be linked if there is no end code.
Each start area contains a reserved area used to control programless
communications from the PLC. Information on how to use programless
uploading and downloading is provided under 5-1-4 Description of Opera-
tion.
• The communications speed will drop if there is a lot of linked data. Adjust
the number of linked data items that are set to suit the system.
• If non-existent settings are set, programless uploading and downloading
will not operate correctly. The communications speed may also be
affected, so always use valid settings.
■ Error Status
The Error Status is used for detection of Basic Unit internal communications
errors.
Programless upload
settings
Variable types: C4/84, C5/85, D4/94, D5/95, and D6/96
Error Status: Error Status on page 118.
Programless download
settings
Variable types: D4/94, D5/95, and D6/96
(Leftmost bit) Unit No. (Rightmost bit)
Error Status 11514131211109 8 7 6 5 4 3 2 1 0
Error Status 231302928272625242322212019181716
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