Spectrum Controls SLC 500 User Manual page 35

Figure 4-3. One Period Rate Measurement
The accuracy while operating in the average mode is ±1 count. When using the
Instant mode, the accuracy is ±1% at 50 kHz and improves to
Hz. The graph below shows the rate accuracy in Hertz vs. Frequency.
Input Range: (Configuration Bits 4-5)
This group of 2 bits selects one of 4 input ranges. Each range is selected for a
given system voltage level. Each range has its own counter trip level. Refer to the
Specifications section of this manual for input limit information.
Table 4-2. Input Range Selection Bits
Mode
AC
DC
DC
DC
The input range must configured in channel pairs to operate properly.
NOTE
Pairs are channels 0-1, 2-3, 4-5, 6-7.
You should allow at least 1 scan time for input range information to be
NOTE
updated at the PLC.
Chapter 4: Channel Configuration, Data, and Status
Frequency Error
Frequency Error
Bit Setting
00
01
10
11
±0.002% at 100
Range
50 mV to 30 VAC
0 to 5 VDC
0 to 12 VDC
0 to 24 VDC
User's Manual Pub. 0300181-07 Rev. A
4-5