10
3 POSITIONING FB
3.1 M+FX5UCPU-Positioning_ABRST
■Output label
FB details
No. Variable name Name Data type Default value Description
(7) o_bENO Execution status Bit OFF ON: The execution command is on.
OFF: The execution command is off.
(8) o_bOK Normal completion Bit OFF When this label is ON, it indicates that absolute position
restoration (ABS current value read) is completed.
(9) o_bServoON Servo ON signal Bit OFF Servo ON signal is on while this label is on.
(10) o_bAbsTrMode ABS transmission
mode
Bit OFF The servo amplifier is in the ABS transmission mode
while this label is on.
(11) o_bAbsReq ABS request flag Bit OFF The ABS data is requested while this label is on.
(12) o_bAbsNG ABS error Bit OFF When this label is on, it indicates that the absolute
position restoration has been completed with an error.
(13) o_uAbsErrId ABS error code Word [Unsigned] 0 Stores the error code of the ABS current value read
(DABS) instruction.
(14) o_bErr Error completion Bit OFF When this label is on, it indicates that an error has
occurred in the FB.
(15) o_uErrId Error code Word [Unsigned] 0 Stores the error code that occurred in the FB.
Item Description
Available device CPU module FX5U CPU, FX5UC CPU
Engineering tool GX Works3 Version 1.007H or later
Language Ladder diagram
Number of basic steps 240 steps
The number of FB steps integrated in the program varies depending on the CPU module used, the input/output definition, and
the setting options of GX Works3. For the setting options of GX Works3, refer to GX Works3 Operating Manual.
Processing • By turning on i_bEN (Execution command), the absolute position is restored.
• When the absolute position restoration (ABS current value read) is completed with an error, o_bAbsNG (ABS error) turns ON
and an error code is stored in o_uAbsErrId (ABS error code). For the error codes, refer to MELSEC iQ-F FX5 User's
Manual (Positioning Control - CPU module built-in, High-speed pulse input/output module).
• If the set value of the target axis is outside the setting range, o_bErr (Error completion) turns ON and the processing of this
FB is aborted. In addition, the error code 100 (hexadecimal) is stored in o_uErrId (Error code). For the error code, refer to
Page 12 Error code.
• If absolute position restoration (ABS current value read) is not completed in 6 seconds, o_bErr (Error completion) turns ON
and the processing of this FB is aborted. In addition, the error code 200 (hexadecimal) is stored in o_uErrId (Error code). For
error codes, refer toPage 12 Error code.
FB compilation method Macro type
FB operation Always executed
Timing chart of I/O signals [When the operation is completed successfully]
i_bEN
o_bENO
Unexecuted
Unexecuted
Read complete
Executed (During read-out)
o_bOK
o_bAbsNG
o_bErr
o_uErrId
o_uAbsErrId
ABS current value read
(DABS) instruction
0H
0H
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