Rice Lake 520 HMI Digital Weight Indicator Manual - BCD Option - Manual (Page 11)

Table 3-1. BCD Pin/Switches
Pin Description
1 Logic Common
2 Logic Common
3 Units (primary/secondary) Switch or Tri-State Enable Input. Serves as remote input switch for the Units or Tri-State
function. Change of state toggles units between primary or secondary; or Logic 1 places output in Tri-State mode.
See Section 2.2 for dip switch configuration
4 Hold Switch. Input freezes the BCD registers
5 Units Bit. Specifies the status of the units; Logic 1 = secondary units, or if enabled by dip switch configuration,
accesses TX serial output
6 4th SD -4
7 4th SD -2
8 4th SD -1
9 Polarity Bit. Specifies the status of the polarity. See Section 3.3 on page 10
10 Leading One. Logic 1 if the sixth significant digit is odd; Logic 0 if it is even. See Figure 3-1 on page 6
11 Zero Bit. Specifies the status of zero. Logic 1 = center of zero
12 MSD 1
13 Print Enable Bit. Specifies data valid, no motion, no overload/underload and positive gross weight. Hold switch must
be at logic 1 (OFF). Logic 1 = print enabled
14 MSD 2
15 Data Valid Bit. Informs the external device that the BCD output registers have been updated and the data is “true.”
Data is not valid if the display shows other than numeric data, if the display is held (in regulatory modes), or if data
integrity has been lost. This bit will toggle momentarily to Logic 0 each time the registers are updated. Logic 0 = data
not valid
16 MSD 4
17 Overload Bit. Specifies the status of positive or negative scale overload. Logic 0 = overload/underload
18 MSD 8
19 Motion Bit. Specifies the status of motion on the scale. Logic 0 = scale in motion
20 4th SD 8
21 3rd SD 8
22 3rd SD 4
23 3rd SD 2
24 3rd SD 1
25 2nd SD 8
26 2nd SD 4
27 2nd SD 2
28 LSD 8
29 LSD 4
30 LSD 2
31 LSD 1
32 2nd SD 1
33 Auto Tare Switch Input. A remote switch for the auto tare function
34 Gross/Net Switch Input. A remote switch for the gross/net function. Signals the indicator to switch between gross
and net modes
35 Gross/Net Bit. Specifies the status of the mode of the scale. Logic 1 = Net mode
36 RX serial output, if enabled by dip switch configuration for communication mode
37 Zero Switch Input. A remote switch for the zero function
Data Information 7