Omron CRT1 - 10-2009, Operation Manual

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322
Status Areas
Section 6-4
DA Conversion Data
DA conversion data is output from the Master Unit as shown in the following
diagram.
Please indicate the two's complement as the DA conversion data for output-
ting of a negative voltage.
Using the NEG (two's complement conversion) is convenient for obtaining the
two's complement from the absolute value.
6-3-2 I/O Data Type and Allocation
I/O Data
Analog Output Slave Units support one type of output data.
Data I/O allocation is performed by CX-Integrator.
Output Data
Use the CX-Integrator to allocate I/O.
I/O Data Allocated in the Master Unit
The Analog Output Slave Unit has the output data allocated by default. No
setting is required. Two words (4 bytes) of output data is allocated. The data is
output as two’s complements.
6-4 Status Areas
An Analog I/O Slave Unit has two status areas: the Warning Status Area and
the Alarm Status Area. The status flags in these areas are turned ON and
OFF based on the threshold/monitor values set for each function in that Unit.
When any of the bits in the status area of the slaves connected to the Master
Unit turns ON, the corresponding bit (bit 12 is for warning status area notices
and bit 13 is for alarm area notices) of the status flag in the Master Unit turns
ON.
The Analog I/O Slave Unit's status area information can be read by using the
CX-Integrator or explicit messages.
3 0 2 1 4 6 5 7 8 10 9 11 12 14 13 15
Output CH0 DA conversion data
Output CH1 DA conversion data
First word + 0CH
First word + 1CH
Data Type Details
Output data (2 output
words (4 bytes)) Used to allocate two words of analog output data.
15 8 7 0
First word
+ 0CH
Analog output value for Output CH0
First word
+ 1CH
Analog output value for Output CH1