Byte 3: Base Value For The Frequencies (Bv) - Siemens SIMATIC S5 Manual

Addressing and Programming
Bit 0 to 7: You must enter a value for the multiplier TI between 1 and 255 in
byte 2 of the configuration message frame. The value "0" disables
pulse generation. During cold restart or on power up, the value "0"
for TI is entered in the PIQ.
a =
BV =
TI =
R =
4.1.5

Byte 3: Base Value for the Frequencies (BV)

Bit 0 to 2: You can select the eight possible frequency ranges for BV with the
three bits FB 0 to FB 2. If you do not enter a value, the module has a
default value of BV = 800 Hz on cold restart or on power up.
Table 4-4. Selecting the Frequency Range
FB2 FB1 FB0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
4-6
BV (Hz) * R
a (Hz/ms) =
4 0.032 ms
*
Frequency increase or decrease
Base value for the frequency ( Table 4-4.)
Multiplier for the time interval TI (1 to 255)
Reduction factor (1 or 0.1). This factor is determined
in the current positioning job.
Base value Accel./decel.
(Hz) (Hz/ms)
TI = 1 to 255
800 6250 to 24.5
400 3125 to 12.25
200 1560 to 6.12
80 625 to 2.45
40 312 to 1.22
20 156 to 0.61
8 62.5 to 0.25
4 31.2 to 0.12
TI
*
Max. freq. Pulse dura-
in kHz where tion µs)
V = 255
204
102
51
20.4 15
10.2 31
5.1 63
2.04 127
1.02 255
EWA 4NEB 812 6061-02a
IP 267
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