Application; Communications Procedure - Omron CQM1H series Operation Manual

Application

Output Circuits
TCj01/TCj03
2-6

Application

2-6-1 Communications Procedure

Power ON
Output
word
Input
FFFF
word
Initialization
1, 2, 3...
• The +DC terminals for NPN outputs are internally connected.
• The 0V terminals for NPN outputs are internally connected.
• Heater burnout alarm outputs (HB1 and HB2) are latched outputs, i.e., they will
not reset by themselves.
The Unit will be in Auto Mode in STOP status when the power supply is turned
ON. An operation control command must be executed to start actual operation.
Refer to 2-6-2 Using Operation Control Commands for details on the com-
mands.
The following diagram illustrates the procedures used to set parameters, moni-
tor data, and read data.
Note No commands are set at startup.
60 ms max.
(1) (2)
Cjjj
Cjjj
0000
Initialization
completed
1. Output word: An I/O allocation command (Cjjj) is set to specify the loop
and the items to be set and monitored.
2. Input word: The I/O allocation command set in the output word will be set by
the system as a "Command Acknowledged Flag" to indicate that the com-
mand has been acknowledged.
3. Output word: The write data for the I/O allocation command set in 1. is set.
4. Input word: After the data specified in 3. has been set, the data specified to
be monitored in 1. will be set by the system. This also functions as a "Write
Completed Flag" to indicate that the write operation has been completed.
TCj02/TCj04
60 ms max.
(3) (4)
Write data
Read data
Section 2-6
245