TOHO ELECTRONICS TTM-339 - Manual (Page 16)

- 16 -
4.17 Event alarm
By setting the events 1 to 4 function setting, outputs of EV 1 to 4 are turned on if PV is located within the alarm range.
Corresponding EV1 to EV4 lamps light up.
By switching over the events 1 to 4 polarities, selection of open/closed is possible at the turn-on.
Output is also turned on at occurrence of a loop abnormality when the events 1 to 4 function 2 setting is effective.
* For loop abnormality, see Section 8.17 “ Loop abnormality.”
The setting can be released by using the key or reset DI, provided that the following condition is met:
(1) Normal status at the release
(2) Standby existent even if abnormality status at the release
Judgment process is performed only during a run (no judgment made during a stop).
Restoration from a power outage is made for the status previous to the outage.
4.18
Loop abnormality
When the primary/secondary control loop abnormality PV change amount setting is not 0, the PV change amount is
determined every loop abnormality time setting time if the present step is a soak.
Consequently, “loop abnormality” occurs if the following condition is met: ⊿PV

Primary/secondary control loop
abnormality PV change amount setting.
Function OFF is established if the primary/secondary control loop abnormality PV change amount setting is 0.
4.19 Blind Function
RUN
OUT
EV1
EV2
EV3
EV4
TS1
TS2
TS3
TS4
AUTO
MANU
AT
END
TIME
PTN STP
RUN
OUT
EV1
EV2
EV3
EV4
TS1
TS2
TS3
TS4
AUTO
MANU
AT
END
TIME
PTN STP
RUN
OUT
EV1
EV2
EV3
EV4
TS1
TS2
TS3
TS4
AUTO
MANU
AT
END
TIME
PTN STP
Press the MODE key.
Hold the MODE key pressed as is although a
change is made to the common parameter
setting 3 seconds after pressing the MODE key.
Holding the MODE key pressed for 10
seconds on the PV/SV screen results in
blinking display. Pressing the MODE key
and then the RESET key results in a change
to the blind mode.
MODE key
Input 1 type
MODE key
△・▽ key
△・▽ key △・▽ key
△・▽キー
To PID To PV-SV
To SET 3
to SET 11
To the following
items
Three-second prolonged
press of the MODE key
MODE key
function setting
MODE key
To the following
items
Setting temperature
MODE key

Holding the MODE key pressed for 10 seconds on the PV/SV screen results in the blind mode.

In the blind mode, “ON” and “OFF” are displayed in the lower row for each character (SV display section). “ON”
indicates display and “OFF” indicates no display (blind). Note that a batch setting applies for the PV/SV screen,
elapsed time screen and operation amount screen.

For a character change in the blind mode, use the DSP.CHG key.

To terminate the blind setting mode, either turn off the power or hold the MODE key pressed for 10 seconds on the
PV/SV screen.

For blind items, see “L/B” in the column of “Command” in Operation Specifications “List of communications
items.”