3.422 Output of S-functions (Spindle speeds)
Depending on how machine parameter 62 is programmed, the output of spindle speeds can be in S-Code or via
an analogue voltage output with up to 8 programmable gear ratios.
a) Coded output of S-functions (Spindle speeds)
The S-Code is provided as a static signal. The impulse duration of the S-gating signal is determined by
parameters 120 and 121 (compare 3.4.1 Output of M-functions). After duration of the time period programmed
with 122, the control input is interrogated for the feedback signal: “Auxiliary function completed”. When this
input is at + 24 V the S-signal is cut-out and the program is resumed. If the input is inactive (at 0 V), the S-
signals are provided and the program run is interrupted until the input is re-activated (at + 24 V).
Spindle speeds are entered into the TOOL CALL program blocks with max. 4 digits in r.p.m. and automatically
rounded-off to the nearest standard speed by the control. The entered spindle speed is automatically coded by
the control in S-Codes in accordance with German standard DIN 66025 page 3, in 100 steps - as listed on
next page (Output is in 2-decade BCD-code).
With the machine parameter 63 “RPM-Code”, the minimum and maximum permissible speed can be entered.
The RPM-steps can be set within the permissible RPM-range.
The code is entered as a 5 digit number:
1 No. of 1
decades
S-Code No.
min. RPM . . 2 01 -99
max. RPM . . 2 01 -99
Step __._........ 1 l- 9
Example:
The RPM-code “2 0 8 0 2” is entered,
i.e. the minimum spindle-RPM is therefore S 20 (1 RPM), the maximum spindle RPM is S 80 (1000 RPM), the
range is more closely defined by the specification that only every second speed is programmable.
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