E L C P r o g r a m m i n g M a n u a l
F o r m o r e i nf o r m a t i o n v i sit :
w w w. e a t o n . c o m
MN05003003E
3-226
Special register
Function
D1036
COM1 (RS-232) communication protocol. Refer to the table in point
number 4 below for the necessary settings.
D1167
The specific end word to be detected for the RS instruction to execute
an interruption request (I140) on COM1 (RS-232).
Supported communication instructions: RS
D1121
COM1 (RS-232) and COM2 (RS-485) communication address.
D1249
COM1 (RS-232) Communication time-out setting (unit: ms). If a
time-out value is set in D1249 and if the data being received times-out,
M1315 will be set ON and the error code K1 will be stored in D1250.
M1315 must be reset by the program when the time-out status is
cleared.
D1250
COM1 (RS-232) communication error code.
Supported communication instructions: MODRW
2.
ELC COM2 RS-485:
Special M-bits and special D-registers for communication instructions RS
/ MODRD / MODWR / FWD / REV / STOP / RDST / RSTEF / MODRW.
Flag
Function
Action
M1120
Retain communication settings. Communication settings will be
reset (changed) according to the content in D1120 after every scan
cycle. Users can set M1120 ON if the communication protocol
requires the port configuration data to be retained. When M1120 =
ON, communication settings cannot be modified when
communication instructions are being processed, even if the
content in D1120 is changed.
User
sets/resets
M1121
Data transmission ready. M1121 = OFF indicates that RS-485 in
COM2 is transmitting
System sets
M1122
Sending request. Before executing communication instructions,
users need to set M1122 to ON by trigger pulse, to initiate sending
and receiving data. When the communications is complete, the
ELC will reset M1122 automatically.
User sets,
system
resets
Содержание ELC-PB
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