Specifications

3
Series RMB Hot Runner Controller Instruction Manual
1.2.6.2 Loop Break Detection
The controller monitors the input change.
If the input value does not change within
999 seconds while the controller is
operating in normal (automatic) mode and
a “bad heater” error has not been detected
(see 1.2.7.5), then the controller signals a
loop break as described in 5.4 and the
controller goes to manual mode with 0%
output, which can then be adjusted.
1.2.6.3 Sensor Error Monitoring
The controller can detect a reversed
sensor or open sensor. The controller
action when a sensor problem is detected
depends on the type of error and the
mode of the controller; see 5.4 and 5.5 for
details.
1.2.6.4 Heater Current
Monitoring
The present current output to the heater,
expressed to the closest tenth of an amp,
is always displayable in the lower line.
Cycle through the available lower line
display items using the DISPLAY key.
1.2.6.5 Output Interruption
Check
An RMB controller constantly checks
heater current readings to ensure that
they correlate with output activity. If a
TRIAC short or bad heater is detected, the
output failure interruption relay breaks the
connection between the controller’s
TRIAC output and the heater. An error
message is also displayed; see 5.6.
1.2.6.6 Ground Fault Detection
Circuit
An RMB controller can detect ground
faults in the controller output. When a
ground fault is detected, the controller
attempts to perform a normal soft start, if
the process value is less than or equal to
200°F (93°C).
The controller performs the soft start up to
three times if necessary. If the ground
fault is detected again after the soft start
has been executed three times, the
controller signals a “hard” ground fault;
see 5.2.
1.2.7 Ease of Setup
DIP switches make it easy to change the
input type and unit of measure. The
defaults are J thermocouple, with degrees
Fahrenheit for North America and degrees
Celsius for other shipping destinations.
The controller tunes itself automatically.
However, you can use the controller’s
front panel to change the proportional
band and rate manually; see 2.4.