FS16i/18i-A, FS16/18-B/C Incorrect position pulses from separate feedback detection function Correction of Manual Page 2
Correction of Manual
TITLE
FS16i/18i-A, FS16/18-B/C
Incorrect position pulsesfrom
separate feedback detection
function Specifications
EDIT DATE DESIG. DESCRIPTION
FANUC LTD
SHEET
2/ 5
DRAW. NO.
A-77967EN Newly registered T.Masuda
E.Genma
97.07.3101
02 98.03.24
(2) is changed
CUST.
1. Outline
The movement of servo motor is executed according to the move command from CNC and
the feedback pulses from pulse coder. However, if the feedback pulses from pulse coder are
not correct data for some reasons, there is a possibility that mis-position occurs because the
relation of position between CNC and servo becomes wrong.
By this function, the incorrect position pulses of feedback pulse can be detected by the
following method and an illegal operation can be prevented.
(1) The servo software sums up the position feedback between the one revolution signals of the
separate pulse coder.
(2) When the servo software receives the one revolution signal from the separate pulse coder,
the total feedback is compared with the parameter 1894 (feedback pulses from one
revolution signal to one revolution signal ).
(3) If the difference between the total feedback and the parameter 1894 exceeds the parameter
2123 ( permissible range ), the servo alarm or the signal output is generated.
Parameter 2123
-
ServoCNC
comparison
Move
Command
DDA
Position, Feedrate,
Current control
motor
FFG
Total pulses
counter
+
+
Parameter
1894
Servo alarm
or
Signal output
Separate
pulse coder
(2)
(2)
(2)
Contents Summary of FS16i/18i-A, FS16/18-B/C Incorrect position pulses from separate feedback detection function Correction of Manual
- Page 1FANUC Series 16i/18i-A FANUC Series 16/18-B/C Incorrect position pulses from separate feedback detection function Specifications Contents 1. Outline ................................................................................................... 2 2. Parameter ....................................
- Page 21. Outline The movement of servo motor is executed according to the move command from CNC and the feedback pulses from pulse coder. However, if the feedback pulses from pulse coder are not correct data for some reasons, there is a possibility that mis-position occurs because the relation of position
- Page 32. Parameter No. #7 #6 #5 #4 #3 #2 #1 #0 1802 PSL Data type : Bit PSL Incorrect position pulses from separate feedback detection function 0 : Disabled 1 : Enabled No. #7 #6 #5 #4 #3 #2 #1 #0 2206 PC3 PC2 Data type : bit axis PC2 Incorrect position pulses from separate feedback detection starts 0 : a
- Page 4No. Data 1894 Feedback pulses from one revolution signal to one revolution signal (2) Data type : 2-word axis Unit of data : Detection unit Valid data range : 0 to 99999999 Set the position feedback pulses between the one revolution signals. The servo software compares this parameter and the total p
- Page 55. Note (1) If a separate pulse coder with only one revolution signal is used, set 0 to the parameter (2) 1894. (2) If a separate pulse coder that the one revolution signal does not exist with a constant interval is used, this function can not be used. 6. Applied Software CNC model-B FS16-MB B0AA-07