Grounding and Shielding
In most cases controllers are installed in enclosures along with other devices, which generate electromagnetic radiation (for example, relays, contactors, transformers, motor invertors, etc.). Such electromagnetic radiation can induce electrical noise into both power and signal lines, as well as direct radiation into the controller, causing negative effects on the system. For this reason, an appropriate grounding, shielding, and other protective steps should be taken at the installation stage to prevent negative electromagnetic radiation effects, for example:
- control cabinet grounding;
- cable shield grounding;
- using protective elements for electromagnetic switching devices;
- proper wiring;
- consideration of cable types and their cross sections;
- and other.
Firmware Version and Device Type (30001)
The type and firmware version of device are encoded in the 30001 Modbus register.
Low byte contains information about the type of device. In case of iSMA-B-MG-IP it is 5910 (0x3B16).
High byte contains the device firmware version multiplied by 10.
In the 30001 register the number is 1511410 = 0x3B0A16. It means that it is a iSMA-B-MG-IP device (0x3B) with firmware in version 1.0 (0x0A16 = 1010).
This 32-bits register contains information about uptime (in seconds). The value is reset after a power cycle.
Device Actions (40001)
Setting the 40001 register according to the table below enables 1 of 3 available actions: reset device, reload settings, and set to default.
Set to default