Output Word 0: Communication Control
bits
description
(octal)
00–07:
reserved
These bits are reserved for PLC use. They may contain any value, and
therefore should not be relied upon to contain any expected value. These bits
should be ignored, or ‘masked off.’
10–11:
reserved
These bits are reserved for future Milltronics use and should be set to 0.
12–14:
decimal
Contains the value which indicates where the decimal place should be, for all
of the returned values 1–6. For example, a 2 indicates the decimal should be
shifted 2 places to the left or right (as determined by bit 15).
15:
decimal shift
Determines the direction of shift for the decimal (bits 12–14):
0 = shift left
1 = shift right
If bits 12–14 are all 0, this bit may be ignored.
16:
numerical format
Determines the numerical format for the data returned in discrete input words
1–6:
0 = normal
1 = percent of span
If a parameter isn’t available as a percent of span, the undefined value
(22,222) is returned.
17:
echo
The value of this bit is echoed back from the discrete output word 0, bit 17.
This bit is only used for test purposes.
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PL-533
Milltronics SmartLink 3/31/97 1:16 PM Page 19
