131
Programless Communications
Section 5-1
!
Caution
• There are 304 programless upload and 304 programless download set-
tings (604 each for version
and 1,204 each for version
),
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 (604
for version
and 1,204 for version
).
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.
The bit corresponding to the unit number will turn ON if an error occurred in
communications during programless downloading or programless uploading.
The status ON/OFF conditions are listed in the following table.
■
Examples:
Bit 15 Turns ON.
This indicates that a communications error has occurred for Unit No. 15.
Communications
Protocols and
Memory Allocation
For the EJ1 to communicate with the PLC, the Programless Communications
Protocol must be set and the area in PLC memory that will be allocated to
parameters for the Programless Upload/Download Settings must be set.
• The communications protocol is set under Programless Communications
Protocol.
• Select the type of memory area under Programless Communications
Upload/Download Data Area and set the start address for the memory
allocation in the Programless Communications Upload/Download Start
Address.
V1.1
V1.2
V1.1
V1.2
(Leftmost bit) Unit No. (Rightmost bit)
Error Status 1 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Error Status 2 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
ON
At least one error occurred.
OFF
Normal communications occurred 22 times in a row (40 times for ver-
sion
, and 77 times for version
).
V1.1
V1.2
Summary of Contents for EJ1 EtherCAT
Page 2: ...EJ1 Modular Temperature Controllers User s Manual Revised July 2008 ...
Page 3: ...iv ...
Page 19: ...xx ...
Page 213: ...188 Detailed Description of Services Section 6 4 ...
Page 227: ...202 Detailed Description of Services Section 7 5 ...
Page 303: ...278 Index ...
Page 305: ......