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14 DEDICATED INSTRUCTIONS
[Control data]
Item
Device
System area
(S)+0
Complete status
(S)+1
Signal received from
(S)+2
servo amplifier
Signal transmitted to
(S)+3
servo amplifier
Status
(S)+4
(S)+5 to
System area
(S)+7
1: The data on the setting side is as follows.
• User
: Data before the execution of dedicated instructions is stored by user.
• System: Data after the execution of dedicated instruction is stored by PLC CPU.
2: Refer to Section 15.2 for error codes at abnormal completion.
[Functions]
Servo amplifier
The state at the time of completion is stored.
• 0
• Other than 0 : Abnormal completion (error code)( 2)
The following signal states taken in from the servo
amplifier to the input module are written.
• b0: ABS data bit 0
• b1: ABS data bit 1
• b2: Transmission data READY flag
The ON/OFF states of the following data which are
calculated using the dedicated instructions by the
"signals received from the servo amplifier" and output to
the servo amplifier are stored.
• b0: Servo amplifier ON
• b1: ABS transfer mode
• b2: ABS request flag
Status of communication with servo amplifier
• 0
• Other than 0 : During communication (System stores)
(1) The positioning data is read from the servo amplifier capable of processing the
absolute positions of the axes to be set (See below), and the values converted with
respect to a unit are stored in "
feed value" area of the QD75.
• ABRST1: Axis 1
• ABRST2: Axis 2
• ABRST3: Axis 3
• ABRST4: Axis 4
For absolute position detection system, carry out the absolute position restoration
operation each time the power is turned ON or PLC CPU is reset.
Input module
Output module
Setting data
–
: Normal completion
: Communication completed
(Set by user at communication start)
–
Md.20
current feed value" and "
PLC CPU
Control data
(S)+0
(S)+1
(S)+2
(S)+3
(S)+4
(S)+5
(S)+7
ABRST
14 - 4
MELSEC-Q
Setting side
Setting range
( 1)
–
–
System
b0: 0/1
b1: 0/1
User
b2: 0/1
–
System
0
User/system
–
Md.21
machine
QD75
Current
feed value
Machine
feed value
Current value data
–
–
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