Modbus Mapping - Johnson Aurum R290 M Serie Guide D'utilisation

9.2 Configuration
To initialize the unit, a group of advanced settings should be provided by the installer. The advanced settings are
accessible in FOR SERVICEMAN mode.
The overall parameters list of the advanced settings can be found in Annex B. Operation Settings. For more
information, refer to the INSTALLATION, OPERATION AND MAINTENANCE MANUAL.
How to enter FOR SERVICEMAN mode
Press and hold and simultaneously for 3 seconds to enter the authorization page. Enter password 234 and
confirm it. Then, the system jumps into the page with a list of advanced settings.
"FOR SERVICEMAN" is only for installer or other specialist with sufficient knowledge and skills.
The end user who use "FOR SERVICEMAN" is regarded as improper use.
Save the settings and quit FOR SERVICEMAN mode
After all settings are adjusted, press
SERVICEMAN mode.
The settings are saved automatically after you quit FOR SERVICEMAN mode.
Temperature values displayed on the wired controller are measured in °C.
In FOR SERVICEMAN mode, select the target item and enter the setting page. Adjust the enablement settings and
values as end user demand. For the list of settings, refer to Annex B. Operation Settings.

9.3 Modbus mapping

1) MODBUS PORT COMMUNICATION SPECIFICATIONS
Port: RS-485; H1 and H2 are the Modbus communication ports.
Communication address: Only one-to-one connection is available for the host computer and wired controller, and the wired
controller is a slave unit. The communication address of the host computer and wired controller is consistent with the
address of HMI Address for BMS (In FOR SERVICEMAN mode).
Baud rate: 9600. Number of digits: 8 Verification: none. Stop bit: 1 bit
Communication protocol: Modbus RTU (Modbus ASCII not supported)
NOTE
, and the confirmation page pops out. Select Yes and confirm to quit FOR
NOTE
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