Eaton XN-312-GW-CAN, Руководство пользователя

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7 Product-specific CAN objects XN300 slice modules
7.25 XN-322-1CNT-8DIO
340
Gateway XN-312-GW-CAN 06/16 MN050003-EN www.eaton.eu
Example
If a value of 255 (dec) is loaded onto the idle clock prescaler, this will yield an
idle reference time of 8
μ s. This corresponds to an f
IDS
of 125490 Hz.
A lower value for the IdleClockPreScaler will make it possible to obtain more
accurate speed measurements at higher speeds. On the other hand, a higher
value will increase the measuring accuracy at low speeds.
7.25.11 System Clock Frequency (Object 0x40F4)
Object 0x40F4 delivers the internal module system clock frequency in MHz.
Design of the data bytes:
Internal clock frequency: 32 MHz (20 hex).
7.25.12 Encoder Measuring Value SDO (Object 0x40F5)
Object 0x40F5 transmits the measured value, the number of pulses counted
(like object 0x30F2), as an SDO.
IdleClock = 32000000 Hz = 125490 Hz
255
Feature Description / Value EDS
Name SystemClock [MxSubExt40F4]
ParameterName=SystemClock
ObjectType=0x7
DataType=0x0005
AccessType=ro
PDOMapping=0
Count=1
Description System Clock Frequency
Object Code ARRAY
Mapping SDO
Data type UNSIGNED8
Sub index 01 … FE hex
Access ro
Byte 0:
Sub index
1
≦ n ≦ 254
B7 B6 B5 B4 B3 B2 B1 B0
System Clock Frequency in MHz