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PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
4 Before Programming
4.1 List of Related Devices
B - 38
4. Before Programming
This chapter describes several items that should be known before programming. They are:
• Operation of related devices, such as output pulse frequency, operation command flag, current value, and
operation monitor flag.
• Items to be set on the PLC side
• Items to be set on the servo amplifier (drive unit) side
• Items to be observed in programming
4.1 List of Related Devices
→ For details on related devices, refer to Section 4.2 to Section 4.4.
4.1.1 Special Auxiliary Relays
The following table shows the related special auxiliary relays. Note that Y000, Y001, Y002, and Y003 are
devices that determine the pulse output destinations.
→ For details on the PLSY (FNC 57), PWM (FNC 58), and PLSR (FNC 59) instructions, refer to the
programming manual.
Device number
Function Attribute
Corresponding
instructions
Refer to
Y000 Y001
Y002
*6
Y003
*1
M8029
"Instruction execution complete"
flag
Read only
PLSY,PLSR,DSZR,
DVIT,ZRN,PLSV,
DRVI,DRVA
and so on.
Subsection
4.4.2
M8329
"Instruction execution abnormal
end" flag
Read only
PLSY,PLSR,DSZR,
DVIT,ZRN,PLSV,
DRVI,DRVA
Subsection
4.4.2
M8338
*2
Acceleration/deceleration
Operation
*3
Drivable
PLSV
Subsection
4.3.9
M8336
*4
Interrupt input specification function
enable
*3
Drivable
DVIT
Subsection
4.3.7
M8340 M8350 M8360 M8370
"Pulse output monitor" flag
(BUSY/READY)
Read only
PLSY,PLSR,DSZR,
DVIT,ZRN,PLSV,
DRVI,DRVA
Subsection
4.4.3
M8341 M8351 M8361 M8371
CLEAR signal output function
enable
*3
Drivable
DSZR,ZRN
Subsection
4.3.4
M8342 M8352 M8362 M8372
Zero return direction specification
*3
Drivable
DSZR
Subsection
4.3.3
M8343 M8353 M8363 M8373 Forward limit Drivable
PLSY,PLSR,DSZR,
DVIT,ZRN,PLSV,
DRVI,DRVA
Subsection
4.3.1
M8344 M8354 M8364 M8374 Reverse limit Drivable
Subsection
4.3.1
M8345 M8355 M8365 M8375
DOG signal logic reverse
*3
Drivable
DSZR
Subsection
4.3.5
M8346 M8356 M8366 M8376
Zero point signal logic reverse
*3
Drivable
DSZR
Subsection
4.3.6
*1. Devices related to Y003 (pulse output destination) are only valid if two FX3U-2HSY-ADP adapters are connected to the
FX
3U PLC.
*2. Only available for FX
3U/FX3UC PLC Ver. 2.20 or later and FX3G PLC.
*3. Cleared when PLC switches from RUN to STOP.
*4. Only available for FX
3U/FX3UC PLC Ver. 1.30 or later.
*5. For the user interrupt input command, the logical NOT function will not be activated.
*6. Y002 (pulse output destination) cannot be specified when the 14-point or 24-point type FX
3G PLC is connected.
*7. Only available for FX
3U and FX3UC PLC Ver.2.20 or later.