Rice Lake 920i Programmable HMI Indicator/Controller - Profibus DP Interface - Manual (Page 9)

Commands 5
3.0 Commands
Commands are used by the Profibus master device to
send and receive data from the Profibus Interface as
integer or floating-point data. The master sends eight
bytes in the output format (used to write commands to
the indicator) and reads eight bytes in the input format
(used to read data from the indicator).
Decimal Point Handling
I n t e g e r c o m m a n d s r e t u r n n o d e c i m a l p o i n t
information to the master. For example, a value of
750.1 displayed on the indicator is returned to the
master as 7501. Floating point commands support
decimal point information with no special handling.
3.1 Output Command Format
To perform a command, the master uses the output
command format to send four 16-bit words to the
Profibus Interface. These four words contain the
command and any parameters necessary to execute it.
The output command format is shown in Table 3-1.
The contents of each output command format word
are described below:
Command number
The number representing the indicator command is
sent in the first word. Table 3-2 lists the commands
that can be specified for
520 , 720i , 820i , and 920i
indicators.
NOTE: A lockout feature that looks for any change in the
output format data is incorporated into the indicator receive
mechanism to prevent inundation by the same command.
Repeated commands must be separated by any other valid
command/parameter/value combination.
Word Description
Word 1 Command number
Word 2 Parameter
Word 3 Value (MSW)
Word 4 Value (LSW)
Table 3-1. Output Command Format
Decimal Hex Command
0 0x000 Return Status and Weight (integer)
1 0x001 Display Channel
2 0x002 Display Gross Weight
3 0x003 Display Net Weight
4 0x004 Display Count
9 0x009 Gross/Net key press (toggle)
10 0x00A Zero
Table 3-2. 520/720i/820i/920if Remote Commands
11 0x00B Display Tare
12 0x00C Enter Tare
13 0x00D Acquire Tare
14 0x00E Clear Tare
16 0x010 Primary Units
17 0x011 Secondary Units
18 0x012 Tertiary Units
19 0x013 Units key press (toggle units)
20 0x014 Print Request
21 0x015 Display Accumulator
22 0x016 Clear Accumulator
23 0x017 Push Weight to Accumulator
32 0x020 Return Gross (integer)
33 0x021 Return Net (integer)
34 0x022 Return Tare (integer)
35 0x023 Return Count
37 0x025 Return Current Display (integer)
38 0x026 Return Accumulator (integer)
39 0x027 Return Rate of Change (integer)
40 0x028 Return Peak (integer)
95 0x05F Set Batching State
96 0x060 Batch Start
97 0x061 Batch Pause
98 0x062 Batch Reset
99 0x063 Batch Status
112 0x070 Lock Indicator Front Panel
113 0x071 Unlock Indicator Front Panel
114 0x072 Set Digital Output ON
115 0x073 Set Digital Output OFF
116 0x074 Read Digital I/O Status
128 0x80 Enable Bus Command Handler
253 0x0FD No operation
254 0x0FE Reset Indicator
256 0x100 Return Status as Weight (float)
268 0x10C Set Tare (float)
288 0x120 Read Gross (float)
289 0x121 Read Net (float)
290 0x122 Read Tare (float)
291 0x123 Read Piece Count (float)
293 0x125 Read Current Display (float)
Decimal Hex Command
Table 3-2. 520/720i/820i/920if Remote Commands