Table 4-2. Network Variable Fields In The Network Variable Editor - GE 90*-30 PLC Series User Manual

GFK-1322A

Table 4-2. Network Variable Fields in the Network Variable Editor

Field
Name The name of the network variable as seen from L
create a new network variable.
Reference Type To change this field, click the scroll bar.
Only network variables of type SNVT_switch or SNVT_lev-disc can use the
discrete reference type.
Network Variable To change this field, click the scroll bar. The choices are:
Direction
Array Size Used to create network variable arrays. Arrays are mapped to subsequent PLC
references. For example, an array of 12 discrete, input, SNVT_switch network
variables starting at reference %I9 would be mapped to %I9 through %I20. For
network variables that are mapped to registers, the network variable data is
packed into the subsequent registers.
Reference Address The reference address specified must be within the PLC reference type blocks
configured for the LBIM. Also, the address cannot be the same as other network
variables.
Valid Bit Address The address of the %I reference type that will be the valid bit for the network
variable.
Default Specifies the default value the PLC will assume for the network variable if a
network error occurs. To change this field, click the scroll bar. The choices are:
Type Specifies the network variable data type. To change this field, click the scroll bar.
The choices are:
Size The number of bytes used by the network variable. You can modify this field only
if the network variable type is user_defined.
Length The total length, in bytes, of the network variable or network variable array. You
cannot modify this field.
Chapter 4 Configuring the LBIM
Description
Discrete — type %I or %Q, depending on direction
Register — type %AI or %AQ, depending on direction
Input — from L W to the PLC
ON ORKS
Output — from the PLC to L
Hold — maintain the last value when an error occurs
Zero — set the value to zero when an error occurs
Standard Network Variable Types — choose from the list of SNVTs
user_defined — allows custom network variables (This is the final
choice on the list of SNVTs.)
W . Enter a name to
ON ORKS
W
ON ORKS
4
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