B&C Technologies M720 Dryer Control (DE, DP, DI Series) - Manual (Page 35)

4.6.2 View Status of Outputs
The View status of outputs screen can be used to check if the controller board is activating an
output. Viewing the status of an output can be done while the machine is running. Selecting
a module number and channel number is done in the same way as in the View status of inputs
screen (see section 4.6.1 on page 31). The main difference between viewing the status of the inputs
and viewing the status of the outputs is the number of available outputs on the dryer controller
itself. The dryer controller has 8 relay outputs and 1 digital outputs. This means that if module
number 0 is selected, the channel number can be varied between 1 and 9.
4.6.3 Test Outputs Manually
This test program can be used to manually activate an output. Because the user takes over control
of all available outputs, password level 1 is necessary to be able to run this test program. Also, if
a program cycle is active, this cycle will be stopped to prevent the dryer from restarting automati-
cally if the user quits this test program.
Selecting a module and channel is done in the same way as selecting an output in the View status
of outputs screen (see section 4.6.1 on page 31 and section 4.6.2 on page 32).
The screen will look the same as the View status of outputs screen, with the difference that the
status of the output is controlled with the E
NTER key. If the right output is selected by setting the
right module and channel number, the output will be in the OFF state initially. When the E NTER
key is pressed, the output will be switched on, and the state will change to ON. The output will
stay in the ON state as long as the E
NTER key is pressed and will return to the off state when the
E NTER key is released.
The following example explains how to test the blower output. The blower output is output num-
ber 7 on the dryer controller. If necessary, select module number 0 with the A
RROW U P and/or
A RROW D OWN key. Module number 0 means testing the outputs on the dryer controller itself.
After that, select channel number 7 with the P LUS and/or M INUS keys. Channel number 7 means
output 7. If the module number is set to 0, and the channel number is set to 7, the blower output
is selected. If the E
NTER key is not pressed, the output status will be OFF. If the E NTER key is
pressed, the controller will switch on the relay at output 7 and the state will go to ON.
4.6.4 Check Power Supply Voltage
The dryer controller has an on-board facility to monitor the voltage supplied to the controller. If
the power supply voltage drops below the low voltage limit or rises above the high voltage limit,
all outputs will be switched off and an alarm message is displayed (see Chapter 5 on page 39).
When Check power supply voltage is chosen in the Test program menu, the screen will show the
current power supply voltage.
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