User`s manual

GFK-1742A 13-1

Local Logic Variables

Local Logic Variable Types

Local Logic accesses the motion controller variables and parameter registers using pre-defined

variable names. Refer to Table 13-1 through Table 13-6 for a complete listing of all Local Logic

variables.

Examples:

IF Actual_Position_2 > 5000 THEN ...;

IF Strobe1_Level_2 = ON THEN ...;

Storing values to variables is performed by using the “:=” assignment operator:

Examples:

Torque_Limit_2 := 8500; (* Set Torque Limit to 85% * )

Position_Loop_TC_1 := 2500 / Actual_Velocity_1;

Local Logic variables are broken down into two categories: Global Variables and Per-Axis

Variables. There are four sets of axis variables (Axis1 - Axis4). Each set of variables is subdivided

into

Control variables

Status variables

and

Faceplate I/0

(refer to Table 13-1 through Table 13-

6 ). A description of the terms used in the Variable Tables follows:

Variable Attribute

The attribute for each Local Logic variable is listed in Table 13-1 through Table 13-6. Variables

can be

Read-Only

Write-Only

Read-Write

. The Parser reports an error if the user attempts to

write to a Read-Only variable or read from a Write-Only variable.

Variable Size

Local Logic variables range in size from 1 bit (Bit Operands) to 64 Bits (for the Double Precision

Dxx registers). Refer to Table 13-1 through Table 13-6 for a listing of the size of each Local Logic

variable. Attempting to write a value larger than a given variable size will result in the value being

truncated. For example, if the result of a math operation is 32 bits long and is assigned to a 16-bit

variable only the low 16 bits will be stored. The Parser reports a warning if a Bit Operand is used

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