Delta DVP-SX2 - Page 383

DVP-ES2/EX2/EC5/SS2/SA2/SX2/SE&TP Operation Manual - Programming
3-262
Points to note:
1. PLC COM1 RS-232: Associated flags (Auxiliary relays) and special registers (Special D) for
communication instructions RS / MODRD
Flag Function Action
M1138
COM1 retain communication settings. Communication settings will be
reset (changed) according to the content in D1036 after every scan
cycle. Users can set ON M1138 if the communication protocol
requires to be retained. When M1138 = ON, communication settings
will not be reset (changed) when communication instructions are
being processed, even if the content in D1036 is changed.
Supported communication instructions: R
S / MODRW
User
sets and
resets
M1139
COM1 ASCII / RTU mode selection, ON: RTU mode, OFF: ASCII
mode.
Supported communication instructions: R
S / MODRW
User
sets and
resets
M1312
COM1 sending request. Before executing communication instructions,
users need to set M1312 to ON by trigger pulse, so that the data
sending and receiving will be started. When the communication is
completed, PLC will reset M1312 automatically.
Supported communication instructions: R
S / MODRW
User
sets and
system
resets
M1313
COM1 data receiving ready. When M1313 is ON, PLC is ready for
data receiving
Supported communication instructions: RS / MODRW
System
M1314
COM1 Data receiving completed. When data receiving of
communication instructions is completed, M1314 will be ON. Users
can process the received data when M1314 is ON. When data
processing is completed, M1314 has to be reset by users.
Supported communication instructions: RS / MODRW
System
sets
and user
resets
M1315
COM1 receiving error. M1315 will be set ON when errors occur and
the error code will be stored in D1250.
Supported communication instructions: R
S / MODRW
System
sets and
user
resets