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3Z4L Laser Micrometer Protocol Appendix N
*1 Depends on the measurement contents.
Note 1. Sequences with interrupt notification are not supported by the CS1W-SCU@@(-V1) and CJ1W-
SCU@@(-V1) Serial Communications Units. A protocol syntax error will occur if an attempt is made
to execute either sequence with a Serial Communications Unit.
Do not set an EM bank as the receive storage word for interrupt notification. A protocol syntax error
will occur if an EM banks is set.
2. Ladder Interface Settings
YES: User settings are required for the 3rd and 4th operands of PMCR(260).
NO: Send word allocation: Set the constant 0000 for the 3rd operand (S).
Receive word allocation: Set the constant 0000 for the 4th operand (D).
3. The hexadecimal equivalents of sequences numbers are given in parentheses.
437 (01B5) Continuous measurement start
(interrupt) (4000-series)
Starts a continuous measurement.
The interrupt notification method is
used for receive data.
No Yes 2
438 (01B6) Measurement termination
(4000-series)
Terminates continuous measurement. No
No
*1
439 (01B7) Data request (4000-series) Requests measurement data in the
idle measurement status or the latch
data generated by the measurement
command.
No Yes
440 (01B8) Forced positive zero
(4000-series)
Sets the forced zero direction to posi-
tive (+).
No No
441 (01B9) Forced negative zero
(4000-series)
Sets the forced zero direction to neg-
ative (–).
No No
442 (01BA) Forced zero release
(4000-series)
Releases the forced zero direction. No No
443 (01BB) 3Z4L initialize (4000-series) Clears the 3Z4L, sets the mm unit,
and clears the memory unit settings.
Ye s N o
444 (01BC) General-purpose command 1 Used to send data of a specified data
length, and receive only OK as the
receive data.
Ye s N o
445 (01BD) General-purpose command 2 Used to send data of a specified data
length, and receive data other than
OK.
Ye s Ye s
446 (01BE) High calibration set Sets the Laser Micrometer’s high cali-
bration.
Ye s N o
447 (01BF) Low calibration set Sets the Laser Micrometer’s low cali-
bration.
Ye s N o
Sequence
No.
Communications sequence
name
Function Ladder interface Notes
Send word
allocation
Receive
word allo-
cation
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