Yokogawa GC1000 Mark II Process Gas Chromatograph - Manual (Page 38)

<6. OPC DA 2.0 Interface>
6-3
IM 11B06E01-01E
l IREG (30001 to 39000)
Read only. Writing through the OPC interface does not cause an error, but nothing can be written
onto the Modbus area of ASGW/ASIU. Unmapped address data is always read as “0”.
OPC Data Name OPC Data Type Function Remark
[email protected](n) VT_UI2 Modbus Address 30001 to 31000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 31001 to 32000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 32001 to 33000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 33001 to 34000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 34001 to 35000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 35001 to 36000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 36001 to 37000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 37001 to 38000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 38001 to 39000 n = 1 to 1000
l HREG (40001 to 49000)
Read/write is possible. Writing data onto unmapped areas is ignored. Do not write data onto the
DSCI-mapped address since the DCS may read wrong values until ASGW/ASIU reads the next
data from devices. Unmapped address data is always read as “0”.
OPC Data Name OPC Data Type Function Remark
[email protected](n) VT_UI2 Modbus Address 40001 to 41000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 41001 to 42000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 42001 to 43000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 43001 to 44000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 44001 to 45000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 45001 to 46000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 46001 to 47000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 47001 to 48000 n = 1 to 1000
[email protected](n) VT_UI2 Modbus Address 48001 to 49000 n = 1 to 1000
NOTE
Although the input relay and input register are read-only data, they are not write protected in the
OPC interface. They should be engineered so that they are write protected from the OPC client
application. Otherwise, if ASGW/ASIU is connected to DCS, the value of input relay or input reg-
ister that has been accidentally written via the OPC interface may be read by the DCS.
4th Edition : Nov. 22, 2011-00