Specifications

BASIC commands
PROGRAMMING MANUAL 148
Revision 5.0
3.2.217 READ_BIT
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3.2.218 READ_OP
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3.2.219 REG_POS
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Type System command
Syntax READ_BIT(bit_number, vr_number)
Description The READ_BIT command returns the value of the specified bit in the speci-
fied VR variable, either 0 or 1.
Arguments • bit_number
The number of the bit to be read. Range: [0,23].
• vr_number
The number of the VR variable for which the bit is read. Range: [0,1023].
Example No example.
See also CLEAR_BIT, SET_BIT.
Type I/O command
Syntax READ_OP(output_no)
READ_OP(first_output_no, last_output_no)
Description READ_OP(output_no), returns the binary value (0 or 1) of the digital output
output_no.
READ_OP(first_output_no, last_output_no), returns the number that is the
decimal representation of the concatenation of the binary values of the range
first_output_no to final_output_no.
Note: The difference between first_output_no and last_output_no must be
less than 24.
Note: Outputs 0 to 7 do not physically exist on the TJ1-MC__. They cannot be
written. Their return value is always 0.
Note: READ_OP checks the state of the output logic. READ_OP can return
the value 1 even if no actual output is present.
Arguments • output_no
The number of the output.
• first_output_no
The number of the first output of the output range.
• last_output_no
The number of the last output of the output range.
Example If output 11 has value 1, output 12 has value 1, output 13 has value 0, and
output 14 has value 1, READ_OP(11,14) returns 13 (1101 bin).
Example In this example a single output is tested:
WAIT UNTIL READ_OP(12) = ON
GOSUB place
Example Check a range of 8 outputs and call a routine if one of them has value 1:
op_bits = READ_OP(16, 23)
IF op_bits <> 0 THEN
GOSUB check_outputs
ENDIF
See also N/A
Type Axis parameter (read-only)
Syntax REG_POS
Description The REG_POS parameter stores the position in user units at which the pri-
mary registration event occurred.
Arguments N/A