6
• Loop table
This enables up to 10 repetitions of parts of a programme (series of segments or single segment) to be set. It is
possible to carry out another nested loop within a loop; the former, however, must be part of the main loop.
• Special and/or auxiliary contacts
To electrically switch on certain characteristic functions of the system as well as auxiliary contacts (external
apparatus).
• How to load a programme
Procedure to load a programme (already saved in the main memory) into the work memory (OP7). This procedure
is always carried out before executing a programme.
• How to save a programme
To memorize a programme permanently in the system’s main memory (Micro PLC).
• Channel 1
Temperature channel.
• Channel 2
Relative humidity channel.
• Duration wait
ON: the segment is considered finished only when the set time has passed. After this period of time the programme
moves on to the following segment, indipendently of the set temperature or humidity value.
OFF: the segment is considered finished when the set time finishes, whether the set point has been reached or not.
NB: The “Duration wait” and “Setpoint wait” flags must not both be turned OFF at the same time.
• Control System
ON: the relevant channel (temperature, humidity, etc..) is controlled
OFF: the relevant channel (temperature, humidity, etc...) is not controlled
• Wait set-point
ON: the segment is considered terminated only when the pre-set set-point value (temperature or relative humidity)
has been reached; the programme then moves on to the next segment.
OFF: the segment is considered terminated at the end of the pre-set time, whether the set-point has been reached
or not.
NB: The "Wait duration" and "Wait set-point" flags should never both be switched off at the same time.
• Maximum speed
ON: the set value (SET POINT) is reached at the highest possible speed.
OFF: the programme considers the set gradient.
• Near set
The tolerance within which the set point is considered to have been reached.
A default value is memorized; this value should not be changed.
In order for this indication to be effective while the programme is being carried out, the “Wait set-point” flag must be
switched on (ON).
• CTRL humid. spec.
ON/OFF: this option has been introduced in order to improve the performance of the system under certain work
conditions. On the basis of the results obtained during a cycle, the user may experiment by changing this flag to see
whether the chamber performance improves or not.
2.4
START-UP
• Use the main switch to turn on the machine.
If the START/STOP switch is not held down, the
following alarm message will appear:
• Press the START/STOP key.
• Use the ACK key to reset the alarm.
ALARM
SWITCH
START/STOP
The warning light on
the OP7 panel flashes
Summary of Contents for OP7
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