Functions, 1 i/o card, Functions -1 – Yokogawa GC1000 Mark II Process Gas Chromatograph User Manual
Page 10: I/o card -1
ASIU has the following functions.
1. Access the I/O cards (DI read, DO write and read back, AI read)
2. Creating the alarm information
3. Interface to DCS through Modbus RTU Slave or Modbus TCP Server
ASIU accesses the I/O card such as DI, DO and AI attached on the FCN to read and write the
Scan interval: 100 msec.
The slots which is not assign the I/O on the resource configurator are not made a read and write,
even IOP check.
Max. 16 points of the digital inputs are read periodically.
Max. 16 points of the digital output are written and read back the output status periodically.
Max. 16 points of the analog data is read periodically.
Data type: Real number
0.0 to 1.0
Accuracy: It follows the specification of each module used. Refer to the GS of the relevant ana-
106.3 % or more
100 to 106.3 %
0 to 100 %
0.0 to 1.0
-6.3 to 0 %
-6.3 % or less
The value of the analog data which is not assigned on the resource configurator is always 0, and
the IOP is also 0.
4th Edition : Nov. 22, 2011-00