Yaskawa JAPMC-MC2300 - Manual (Page 45)

2.6 Restrictions for Feedback Pulse Inputs
2.6.2 Restrictions in SVA-01 Module Pulse Input Frequency
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Settings and Installation
2.6.2 Restrictions in SVA-01 Module Pulse Input Frequency
The upper limit to the SVA-01 Module pulse input frequency is shown below.
Upper Limit (actual value) to the SVA-01 Module Phase-A/B Input Pulse Frequency =
4 MHz (before multiplication)
The following table shows the relationship between the number of encoder bits and the maximum speed for a pulse
input frequency of 4 MHz to the SVA-01 Module. Application must be within the range shown in the table when input-
ting pulses to the SVA-01 Module.
* The above table is used to explain restrictions in the SVA-01 pulse input frequency. It contains some numbers of bits
and motor speeds that do not actually exist on the products.
Therefore,
Motor Speed at a Pulse Input Frequency of 4 MHz = 4 × 10 6 × 60 ÷ Encoder resolution
Encoder Bits *
Encoder Resolution
(before multiplication)
Motor Speed (min -1 ) *
at a Pulse Input Frequency of 4 MHz
12Bit 1024 234375
13Bit 2048 117187
15Bit 8192 29296
16Bit 16384 14648
17Bit 32768 7324
18Bit 65536 3662
19Bit 131072 1831
20Bit 262144 915
21Bit 524288 457
22Bit 1048576 228