Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 353)

14-5
IM 04L31A01-01E
Specifications
14
14.3 Alarm Function
Control Alarms
Control alarm types: PV upper-limit, PV lower-limit, deviation high limit, deviation
low limit, deviation high/low limit, deviation high and low limits,
SP high limit, SP low limit, output high limit, and output low
limit.
Other alarm types: Self diagnosis alarm and FAIL alarm
Alarm stand-by action: Turns off PV/SP alarms until operation becomes stable after
starting control.
Alarm output: 6 outputs/2 loop (4 transistor outputs and 2 relay outputs)
Number of set alarms: 4 type/loop
Hysteresis: Specifiable for each set alarm
Indication: Status indication (alarm type) in the digital display section and
common alarm indication when an alarm occurs.
Hold/Non-hold switchable
Measurement Alarms
Alarm types: High limit, low limit, difference high limit, difference low limit,
high limit on rate-of-change, low limit on rate-of-change, delay
high limit, and delay low limit (alarm delay)
Alarm delay time: 1 to 3600 s (1 hour)
Time interval for rate-of-change alarm:
Scan interval × 1 to 15
Alarm output: 6 outputs (option)
* Can also be assigned to control output
Energized/de-energized, hold/non-hold switchable
Number of settings: Set up to 4 alarm on each channel
Hysteresis: ON (0.5% of span)/OFF (all channels and levels common)
switchable
Indication: Status indication (alarm type) in the digital display section and
common alarm indication when an alarm occurs.
Hold/Non-hold switchable