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Haiwell PLC - Temperature & Humidity Module Application Case
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②
If in the process of using, one of the temperature sensors is broken(any position), how to replace the sensor at this time?
A: The module does not need to be powered down, simply remove the damaged sensor, put a new one, then H32DT module will
automatically identify and determine it. The temperature read by new sensor will automatically replace the damaged sensor,
without affecting the other normal sensors' temperature acquisition.
③
If in the process of using, multiple temperature sensors are broken(any position, such as 3), how to replace these sensors at
this time?
A: Just remove these damaged sensors and replace them with new ones in order.
The sequence here that is described earlier, it means the sequence of access sensors at the beginning, from near to far or from
far to near. For example, the 16 sensors of channel 1 begin to be accessed from near to far in order, when using, the 2 #, 7 # and
13 # sensors are broken. At this point, the module need't power off, remove the 2 #, 7 #, 13 # sensors, put on new ones, according
to the sequence, first access to the original position 2 # sensor, then 7 #, and finally the sensor position 13 #. In this way, the
H32DT module will automatically identify and determine, the temperature values read by new sensors will automatically replace
the damaged sensor, without affecting the other normal sensors' temperature acquisition.
In a similar way, if accessing to sensors according to from far to near, then when replacing them also from far to near.
④
If in the process of using, H32DT module itself is damaged, at this time, how to deal with to make sure that the sensors
configured in front of are still the same order and can work normally?
A: The method for saving the module parameters was introduced in the previous section. Here you can use this configuration
parameter to reflect the importance of the H32DT module configuration parameters.
H32DT module is damaged, at this moment, we only need to import the previously saved module parameters to new H32DT
module through the remote module tool, import the previous configuration table, and finally click parameters download to
download the parameters into the module.
The each position's temperature value and the sequence of the module will be consistent with the previous module.This can be
very convenient to solve the replacement damaged modules problems.
⑤
The 4th point introduces the inportance of H32DT module parameter table, so does it mean that we should re-save a
parameter table every time after replacing the probe?
A: Yes. After replacement each time, save a copy, this is a very rigorous and safe operation.
⑥
In the actual application, how to clear the H32DT module parameter configuration?
A: There are two ways, one for software removal configuration and one for hardware removal configuration. The following
introduction:
Software removal configuration, click the default value in the channel without accessing any sensor, then click the parameter
download to clear the configuration (sensor serial number).
Hardware removal configuration, configuration can be cleared (sensor serial number) by powering off and powering on the module
for three times without accessing any sensor in the channel. The times of channel removal power-down configuration can be
viewed in CRC6H and CRC7H.
⑦
H32DT channel indicator on the module is 0 and 1, what are the states of always-on and flashing?
A: 0 and 1 always-on means that the channel is working normally, flashing indicates that the sensor is disconnected.
⑧
For H32DT module, how to do the channel sensor communication break alarm?
A: The digital temperature module parameter table shows, H32DT module communication break alarm register are CR32H
channel 1 and CR33H channel 2. So when extending through the parallel port, we can write the program as follows:
This example, the module is in the second lacation of hardware configuration, so in FROM instruction, we set Slot = 2,
hexadecimal 32H, that is, decimal 50, the V30V31 in the program respectively indicates channel 1 break alarm register and
channel 2 break alarm register . Through WTOB, we know that M100 ~ 115 as the break alarm status bits corresponding to 16
sensors in channel 1. M116 ~ 131 is the break alarm status bits corresponding to 16 sensors in channel 2, so the program is as
