Spectrum Controls 140 ACI 052 00sc - Manual (Page 18)

12
Installation Instructions
32-Channel Analog Input Module
Quantum Series 140 ACI 052 00sc
Time stamp channel select (4x+0 bits 13-16)
0000 = Channels 1-2 1000 = Channels 17-18
0001 = Channels 3-4 1001 = Channels 19-20
0010 = Channels 5-6 1010 = Channels 21-22
01001 = Channels 7-8 1011 = Channels 23-24
0101 = Channels 9-10 1100 = Channels 25-26
0101 = Channels 11-12 1101 = Channels 27-28
0110 = Channels 13-14 1110 = Channels 29-30
0111 = Channels 15-16 1111 = Channels 31-32
The Time Stamp register format is:
N = (Channel Select*2)+1
3x+0
1 .. 16: Chan N..: Data word.
3x+1 1 .. 16: Chan N..: Timestamp: Secs/*SSC BCD.
3x+2 1 .. 16: Chan N..: Timestamp: Hour/Min BCD.
3x+3 1 .. 16: Chan N..: Time stamp: Month/Day BCD.
3x+4 1 .. 16: Chan N+1: Data word.
3x+5 1 .. 16: Chan N+1: Timestamp: Secs/*SSC BCD.
3x+6 1 .. 16: Chan N+1: Timestamp: Hour/Min BCD.
3x+7 1 .. 16: Chan N+1: Timestamp: Month/Day BCD.
* The Sub Seconds Count (SSC) field is not an even time period count such as seconds. Instead, it is a
counter which increments whenever an alarm occurs at the same Hour/Min/Sec setting the previous alarm.
This field insures unique time stamps for alarms detected within the same second.
❑ Alarm Timestamp Update Mode: The alarm timestamp update mode
may be set to scrolling or latched. In scrolling mode any new events
will be captured and the time stamp will reflect the last time at which
an alarm existed for that channel pair. If the channel pair moves out
of an alarm condition, then the time stamp would reflect the exact
time that this occured. In latched mode only the first event will be
captured and saved until the alarm is cleared. In either case, the alarm
will be cleared by reading it.
☞ Note: Time Stamp data is stored in RAM and will be lost if system power is lost for any reason.
❑ Alarm Limits: The second and third zoom screens (figured 2.2 and
2.3) allow the user to define sixteen unique alarm limits. Each alarm
is defined with a high and low setpoint. Each limit applies to two
adjacent channel The data format for the alarm must match the format
for that channel’s group as assigned in the first zoom screen. For
example, if group 1 configured as a -10V to +10V range and DVM
format, a low of -5000 and a high of 5000 will trigger alarms at voltages
less than or equal to -5V and voltages above +5V respectively.