TOHO ELECTRONICS TTM200 - Manual (Page 72)

48-7009-E 5-2
5.1 Precautions on operating the equipment
Before beginning operation or turning on the power, check the following.
★ Operation for turning on the power
The equipment is not equipped with a power switch. Connecting a power will turn the power of the
unit ON. The initial screen is displayed for about 4 seconds, and then the equipment operates.
The control mode for the control setting mode is set for RUN (control start) in factory default. After
wiring is complete and the setting value (SV) is set, the control starts.
At factory default, the control method is set for the PID control.
* Proportional band: 3.0 %
Integration:
0 second
Derivation: 0 second
Proportional cycle: Relay contact output 20 seconds
SSR drive output 1 second
★ Behavior during input abnormality
Open or short (only for a resistance temperature detector) of input signals is determined as an input
abnormality (such as burnout) by the equipment.
Input type
Display on the
equipment
Operation of control
output
Operation of event
output
Thermocouple
Overscale
Operating amount
limiter lower limit
Analogous to the
setting for at-input
abnormality.
(See pages 6-39 to
41.)
Resistance temperature detector
0 - 10 mVDC
0 - 1 VDC
Underscale
0 - 5 VDC
1 - 5 VDC
0 - 10 VDC
4 - 20 mADC
* Burnout function: A function to forcibly move outputs of a controller toward upper limit or lower
limit (safety side) in case the wires are disconnected on a thermocouple or resistance temperature
detector.
★ Checking each parameter
Set each parameter such as setting value (SV) or PID to a value that is appropriate for the subject of
control.
For details of setting each parameter, see the item 6 “Parameter setting.”
For details of switchover setting of RUN (control start) and READY (control stop), see pages 5-20 and
21.
★ Operation at power-outage (momentary outage)
There is no effect on operation in case of outage in 1 cycle or less.
1 cycle
50 Hz 20 ms
60 Hz 16.7 ms
For DC power with the outage for 40 ms or shorter, there is no effect on operation.
In case of the outage for longer than 40 ms, the equipment is reset.