Output Hold Function; Writing Set Values - Omron SYSMAC C200H-AD003 Operation Manual

Analog Output Functions

4-6-2 Output Hold Function

1, 2, 3...

4-6-3 Writing Set Values

The Analog I/O Unit stops conversion under the following circumstances, and
output the value set by the output hold function.
1. When the Conversion Enable Bit is OFF. (Refer to 4-4-1 IR Area Allocation
and Contents and 4-6-4 Starting and Stopping Conversion.)
2. In adjustment mode, when something other than the output number is out-
put during adjustment. (Refer to 4-8-3 Output Offset and Gain Adjustment
Procedures.)
3. When there is an output setting error. (Refer to 4-6-5 Output Setting Errors
and 4-9-1 Troubleshooting Procedures.)
4. When a fatal error occurs at the PC. (Refer to the C200HX/HG/HE Program-
ming Manual.)
CLR, HOLD, or MAX can be selected for the output status when conversion is
stopped.
Output signal
range
0 to 10 V –0.5 V (Min.–5%
of full scale)
–10 to 10 V 0.0 V
1 to 5 V 0.8 V (Min.–5% of
full scale)
4 to 20 mA 3.2 mA (Min.–5%
of full scale)
In order to specify the the output hold function, use a Peripheral Device to set the
DM words shown in the following table.
DM word
DM (m+2) Output 1: Output status when stopped
DM (m+3) Output 2: Output status when stopped
For the DM word addresses, m = 1000 + 100 x unit number (Units #A to #F = Unit
numbers 10 to 15).
Note After making the DM settings from a Peripheral Device, it will be necessary to
either power up the PC again or turn ON the Special I/O Unit Restart Bit in order
to transfer the contents of the DM settings to the Special I/O Unit. For details re-
garding the Special I/O Unit Restart Bit, refer to 4-9-4 Restarting Special I/O
Units.
Analog output set values are written to IR words n+1 and n+2.
Word
n+1 Output 1 set value
n+2 Output 2 set value
For the IR word addresses, n = 100 + 10 x unit number.
For Units #A to #F (10 to 15), n = 400 + 10 x (unit number – 10).
CLR HOLD
Voltage that was output
just prior to stop.
Voltage that was output
just prior to stop.
Voltage that was output
just prior to stop.
Current that was output
just prior to stop.
Function
Function
Section
MAX
10.5 V (Max.+5%
of full scale)
11.0 V (Max.+5%
of full scale)
5.2 V (Max.+5% of
full scale)
20.8 mA
(Max.+5% of full
scale)
Set value
xx00: CLR
0 output
xx01: HOLD
Hold output value
prior to stop p p
xx02: MAX
Output maximum
value of range
Set any value in the
leftmost bytes (xx).
Stored value
16-bit binary data y
4-6
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