Campbell Scientific SDM-INT8 8-Channel Interval Timer - Manual (Page 16)

SDM-INT8 8 Channel Interval Timer
TABLE 2. Instruction 101
Parameter Data Description
Type
01:
2 Address (Section 6.1)
02: 4 *Input config; channels 8,7,6,5
03: 4 *Input config; channels 4,3,2,1
04: 4 **Function; channels 8,7,6,5
05: 4 **Function; channels 4,3,2,1
06: 4 ***Output option
07: 4 Loc
08: FP Mult
09: FP Offset
Execution time: 2.3 ms + 1.65 ms/value + averaging interval
(See Appendix B to estimate processing time on higher
frequency signals)
Intermediate Storage: 1 location
* Input configurations (Section 6.2):
0 = high level, rising edge
1 = high level, falling edge
2 = low level, rising edge
3 = low level, falling edge
**Functions (Sec. 6.3):
0 = no value returned
1 = period in ms
2 = frequency in kHz
3 = time since previous channel is ms
4 = time since channel 1 in ms
5 = counts on channel 2 since channel 1
6 = low resolution frequency in kHz
7 = counts
8 = integral counts on channel 2 since channel 1
*** Output (Sec. 6.4):
0 Execution interval averaging
0- - Continuous averaging
XXXX Specified averaging interval in ms, XXXX>0
XXXX- - Capture all events until XXXX edges of channel 1
(0<XXXX<8000)
9999- - Test memory
6. Programming Details
6.1 SDM Address
The INT8 is enabled by an address sent from the datalogger. A terminal block
located inside the INT8 has two jumpers which define the INT8 address. The
address defined by the jumpers must match the address entered into SDMINT8
or Instruction 101. The jumpers are set at the factory for address 00. If the
jumpers have not been changed, the SDM address entry is 00. Each INT8
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