User guide

eWON 500-2001-4001-4002 User Guide - IO Servers Configuration
eWON 500®2001®4001®4002® Version 4_3_0 - User Guide - 10/5/05 - ©ACT'L sa - Page 85
6.4.3 Tag name convention
The Item Name can contain the PLC address where the value is polled, or not. If address is not specified at the Tag level,
the global topic address will be used. If Topic address is not defined either, the Tag will be disabled.
6.4.3.1 ValueName
• Bit access modifier:
In any of the items above, it is possible to access a single bit (except for float items).
#x must be appended to the Tag name. (Bit index goes from 0..31)
The syntax can be used for reading bits and for writing them as well.
Example:
DB1W13#3 represents bit 3 of W13 in DB 1
REM:
Bit index range depends on item referenced (for W, bit index maximum value is 15)
6.4.3.2 Device Address
The device address is either appended to the ValueName in the Item Name definition, or entered in the Topic global address fields.
The device address is composed of: RemoteStationAddress,eLinkIpAddress:
• RemoteStationAddress: is the PLC’s MPI address
• eLinkIpAddress: is the eLINK IP address.
Important:
If the PLC address is defined at the Topic level, it can be omitted in the Tag definition. In that case the Tag name will only contain
the "ValueName".
If the PLC address is specified at the Topic level, it will replace any address defined Tag by Tag.
IO Server configuration
IO Server Name NETMPI
Topic Name
A
B
C
Item Name
ValueName,RemoteStationAddress,eLinkIpAddress PLC Address is defined Tag by Tag
ValueName Topic PLC Address is used
Table 57: NETMPI - IO server configuration
DBxBy Data block x Byte offset y (0-255)
DBxWy Data block x Word offset y (0 - 65535)
DBxFy Data block x Float offset y (+-3.4e38)
DBxDy Data block x DWord offset y (-2147483648->2147483647)
MxB Memento x as byte
MxW Memento x as word
MxF Memento x as real
MxD Memento x as double
Tx Timer x (0-65535)
Cx Counter x (0-65535)
Table 58: value names for NETMPI addresses