Parker 6250, User Manual

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90
6250 Servo Controller User Guide
Current
Commanded &
Actual Position
The current commanded and actual positions (ANI, DAC, FB,
PC
, PCA, PCC,
PCE
,
PER
,
PE
) can be used within an expression, if the operand is compared against a numeric variable or
value. When making the comparison, the relational operators (
=
,
>
,
>=
,
<
,
<=
,
<>
) and
logical operators (
AND
,
OR
,
NOT
) are used.
Expression Description
(VAR1<1PE)
True expression if the value of variable 1 is less than the actual
position of axis 1
(2PC=4ØØØ)
True expression if axis 2 commanded position equals 4000
Error, Axis, and
System Status
The error status, axis status, and system status operands (
ER
,
PER
,
AS
,
SS
) can be used
within an expression, if the operand is compared against a binary variable or a binary or
hexadecimal value. When making the comparison, the relational operators (
=
,
>
,
>=
,
<
,
<=
,
<>
) and logical operators (
AND
,
OR
,
NOT
) are used.
Expression Description
(ER.12=b1)
True expression if error status bit 12 is equal to 1
(AS=h3FFD)
True expression if axis status is equal to hexadecimal 3FFD
Timer Values
The current timer value (
TIM
) can be used within an expression, if the operand is compared
against a numeric variable or value. When making the comparison, the relational operators
(
=
,
>
,
>=
,
<
,
<=
,
<>
) and logical operators (
AND
,
OR
,
NOT
) are used.
Expression Description
(VAR1<TIM)
True expression if the value of variable 1 is less than the timer
value
Data Read from
the Serial Port
The
READ
command can be used to input data from the RS-232C serial port into a numeric
variable. After the data has been read into a numeric variable, that variable may be used in an
expression.
Example Description
VARS8="ENTER DATA"
Define message (string variable 8)
VAR2=READ8
Send message (string variable 8) and then wait for immediate
data to be read (into numeric variable 2)
!'88.3
Immediate data input
IF (VAR2<=1ØØ)
Evaluate expression to see if data read is < or equal to 100
. . . . .
NIF
End of
IF
Data Read from
the RP240
The
DREAD
and
DREADF
commands can be used to input data from the RP240 into a numeric
variable.
DREAD
reads a number from the RP240's numeric keypad.
DREADF
reads a number
representing a RP240 function key. After the data has been read into a numeric variable, that
variable may be used in an expression.