C500DA101 Omron, C500DA101 Datasheet - Page 93

• Manufacturer Part Number: C500DA101
• Description: ANALOG OUTPUT UNIT
• Manufacturer: Omron

Specifications of C500DA101

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• No. Of Analog Outputs: 4
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

READ/WRIT Execution Restrictions
5-4-2 IR/CIO Bit Allocations
78
Data Exchange with CPU Unit
1, 2, 3...
The completion of execution of the I/O READ and I/O WRITE instructions can be
determined by checking the status of the Equals Flag. The Equals Flag will be
ON when execution has been completed.
If the program writes output data after parameters, design the program as fol-
lows: Even if an attempt is made to write output data immediately after parame-
ters, such as scaling upper and lower limits, upper and lower limits, and binary/
BCD mode settings, are written, the data may not be correctly written due to the
internal processing of the Analog Output Unit. For this reason, design the pro-
gram so that it writes output data at least 100 ms after parameters have been
written. Also, the Parameter Update Bit must be turned ON to make the written
parameters valid.
The Analog Input Unit communicates to the CPU Unit using two-word mode
addressing. The I/O READ and I/O WRITE ladder instructions are used to read/
write data between the Analog Input Unit and the CPU Unit. The Unit requires
two words in the I/O table, one output word from the CPU Unit to the Analog Input
Unit, and one input word from the Analog Input Unit to the CPU Unit. The func-
tions of these words are described in the following tables.
Equals Flag
1. The differentiated versions of the READ and WRIT instructions cannot be
2. The READ and WRIT instructions cannot be simultaneously executed for
3. One SYSMAC BUS/2 Remote I/O Master Unit can simultaneously handle
4. Therefore, when continuously executing READ instructions, you can use
5. Up to four SYSMAC BUS/2 Remote I/O Master Units can be mounted to the
6. Up to 255 words can be transferred using a READ or WRIT instruction.
executed for Special I/O Units on SYSMAC BUS/2 Slave Racks. The READ
and WRIT instructions must be executed until the = Flag (A50006) turns ON
indicating that the execution is completed.
the same Special I/O Unit. In such cases, execute WRIT first, and after the
execution is completed, execute READ.
up to two READ and WRIT instructions. If two READ and WRIT instructions
are executed for Units mounted to SYSMAC BUS/2 Slave Racks and an at-
tempt is made to execute a READ or WRIT instruction for a third Unit, the CY
Flag (A50004) will be turned ON without executing the third instruction.
the READ and WRIT instructions for a maximum of two Special I/O Units
under each SYSMAC BUS/2 Remote I/O Master Unit.
CV1000 or CV2000. In this case, therefore, up to eight READ and WRIT in-
structions can be executed simultaneously.
Flag
SR 6306
C500
SR 25506
C1000H/C2000H
A50006
Section
CVM1/CV
5-4