¶ General Information
The device supports communication with IQFreeze (IQF) over the following interfaces:
- RS-232
- RS-485 (Modbus RTU)
- CAN (Custom CAN Parameters)
The RS-232 interface supports a limited set of IQFreeze parameters and requires minimal configuration.
The RS-485 and CAN interfaces provide access to all IQFreeze parameters but require additional configuration.
IQFreeze can be connected using a single interface or multiple interfaces simultaneously (data is collected independently through each interface). The device then combines the collected data and sends it to the server as a single dataset.
If you are using IQFreeze Lite (which provides data from external temperature sensors), use either the CAN or RS-485 interface.
If you are using IQFreeze connected to a refrigeration unit, we recommend using RS-232. If the standard parameter set is not sufficient, additionally connect RS-485 or CAN.
¶ IQFreeze Pinout
The connector designations shown below are taken from the IQFreeze documentation.
¶ RS-232 Connection
¶ Wiring Diagram
The IQFreeze connector designations are shown above and can also be found in the IQFreeze documentation.
Connect the device to IQFreeze connector XP5, pins 3 and 4.
¶ Configuration
On the "RS-232 / RS-485" tab, configure the RS-232 interface as follows:
- Device 1 =
Refrigeration Unit - Type =
IQFreeze
On the "Protocol Settings" tab, enable the required fields.
- Data Transfer Protocol Version =
FLEX 3.0
¶ RS-485 Connection
¶ Wiring Diagram
Communication with IQFreeze over the RS-485 interface uses the Modbus RTU protocol.
The IQFreeze connector designations are shown above and can also be found in the IQFreeze documentation.
Connect the device to IQFreeze connector XP6, pins 3 and 4.
¶ Configuration
Request the latest Modbus register documentation from the IQFreeze manufacturer.
At the time this article was written, the following spreadsheet was used:
https://docs.google.com/spreadsheets/d/1UmNDB0eenmAe2PV4FZCbVdLbfoVCZF7AML5FxT1jNJA
Configure the interface according to the manufacturer's documentation.
On the "RS-232 / RS-485" tab, configure the RS-485 interface. The example below shows a configuration for reading six analog temperature sensors.
- Baud Rate =
9600 - Parity =
None - Stop Bits =
1 - Device 1 =
Modbus
Configure all remaining parameters according to the manufacturer's documentation or the example above.
On the "Protocol Settings" tab, enable the required fields.
- Data Transfer Protocol Version =
FLEX 3.0
¶ CAN Connection
¶ Wiring Diagram
The IQFreeze connector designations are shown above and can also be found in the IQFreeze documentation.
Connect the device to IQFreeze connector XP6, pins 7 and 8.
¶ Configuration
Request the latest CAN parameter documentation from the IQFreeze manufacturer.
At the time this article was written, the following spreadsheet was used:
https://docs.google.com/spreadsheets/d/1UmNDB0eenmAe2PV4FZCbVdLbfoVCZF7AML5FxT1jNJA
Configure the interface according to the manufacturer's documentation.
On the "CAN Bus" tab, configure the interface. The example below shows a configuration for reading six analog temperature sensors.
- Use Built-in CAN Interface =
Enabled - Parameter Reading Mode =
Custom Parameters - Interface Mode =
Active - CAN Speed =
250000
Configure all remaining parameters according to the manufacturer's documentation or the example above.
On the "Protocol Settings" tab, enable the required fields.
- Data Transfer Protocol Version =
FLEX 3.0