The scale and indicator connection checklist

Twelve things to confirm before anyone writes a line of code. Use it on your next site visit.

1. Make, model and firmware
Of the scale and the indicator.
2. How it sends weight
Continuously, on request, or when a print button is pressed.
3. Which connection is available
RS-232, RS-485, Ethernet, USB, Modbus or analogue.
4. The data format
Is there a manual describing the output string or protocol?
5. Approval status
Is the indicator legal-for-trade approved, and are its settings sealed or locked?
6. Stable weight
What tells the system the reading is stable?
7. Distance and cabling
From the indicator to the nearest PC or gateway.
8. Power and network
At the scale: wired, Wi-Fi or mobile.

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