Revised 2017-08-31
Automation Tab
Drawing No. LP0997-C
I/O Settings (RAM-9000 Models)
Sixnet
®
Series SN/RAM
®
6000 & RAM 9000 Software Manual
- 219 -
Note:
Two (2) consecutive registers are always allocated in the “CNT IODB/Modbus Address” column
whether set for 16-bit or 32-bit mode. Therefore, when using 16-bit Count Returned option, the
second register should be ignored.
Counter Mode:
When this option is selected, the counter mode must also be selected. If the 16-bit Counter
Returned is selected, the analog input register increases from 0 to 32767, then -32768 to 0. If the 32-bit Count
Returned is selected, the long integer input register increases from 0 to 4.2949673E9, then -4.2949673E9 and
back to 0. The menu selections for this options are listed below:
Note:
When the Input Mode is set to Slow Response (filtered) some of the Counter Mode options are not
particularly suited since the maximum count is 10Hz. For example, Frequency Rate 0.1s would only be
capable of measuring one count.
Up:
Upward accumulator of input pulses
Run time sec:
This is the on-time timer feature that counts the time the associated input is in the ON state.
The output for this option is in seconds.
Run time min:
This is the on-time timer feature that counts the time the associated input is in the ON state.
The output of this option is minutes.
Freq. Rate:
Depending on the frequency rate selected, the pulses are accumulated for 100ms, 200ms,
500ms, 1 second, 2 seconds, 5 seconds, 10 seconds, 30 seconds, 60 seconds or 60 minutes.
ON Pulse Width:
Width time is ms between consecutive leading (OFF to ON) and trailing (ON to OFF)
edges.
OFF Pulse Width:
Width time is ms between consecutive leading (ON to OFF) and trailing (OFF to ON)
edges.
•
Pulses longer than the maximum size allowed by the register will result in an overflow condition
(full scale 16-bit value equal to 65535)
•
Pulses shorter than 1ms will not be accurately detected resulting in erroneous values.
•
If no edge is ever detected by an input, the result will read as $0000. Timing only begins when an
edge is detected.
Note:
Counters are volatile (they will forget their counts if power is lost). Typically, retention of the values and
resetting the counts is accomplished in software at the host computer that polls these inputs.
CNT Modbus Address:
Configuration must be sequential, CNT addresses are sequential by two registers
from the base address.
