
A-79208E
Edit
Apprv.Desig.
Sheet
Title
Draw
No.
Date
Design
Descri
tion
Date
FS16i/18i
21i - MB/TB, FS18i-MB5
Improvement of Dual Check Safety function
(Spindle speed alarm detection at safety signal mode A/B)
Specifications
04/01/13
4/4
Sheet
3. Signals
Safe speed selection signal A
SPA1~SPA4 <G338#0~#3> <DI+006#0~#3> (for spindle axes)
Safe speed selection signal B
SPB1~SPB4 <G338#4~#7> <DI+006#4~#7> (for spindle axes)
[Classification] Input signal
[Function] These signals select safe speed in dual check safety function.
These signals are provided for each axis; the affixed number of the signal name
shows the axis number.
SPA1, SPB1
1: Safe speed selection for the 1st spindle axis
2: Safe speed selection for the 2nd spindle axis
3: Safe speed selection for the 3rd spindle axis
4: Safe speed selection for the 4th spindle axis
[Operation] The relation between the safe speed signals and safe speed is as follows:
Safe speed signals Safe speed
SPAn SPBn
Parameter for spindle
Safe speed 1
00
No.4372
Safe speed 2
10
No.4438
Safe speed 3
01
No.4440
Safe speed 4
11
No.4442
NOTE1) Not only FSSB I/O module (basic) but also FSSB I/O module (extension) is required
for using safe speed selection signals.
NOTE2) Please change these signals if it is necessary to change the safe speed at changing
safety signal mode.
4. Reference item
FANUC Series 16i/18i/21i- MODEL B Improvement of safe speed monitoring and safe
machine position monitoring (A-78735E)