Set digital input stamping – Measurement Computing TempScan/1100 User Manual
Page 234
A-38 API Command Reference
889897
TempScan / MultiScan User’s Manual
I#
- Set Digital Input Stamping
TYPE
System
EXECUTION
Deferred
SYNTAX
I#state
Specify whether or not digital input stamping will be enabled. Valid options for
state
are:
0
- Disable digital input stamping (default), and
1
- Enable
digital input stamping.
DESCRIPTION
The Set Digital Input Stamping (
I#
) command, when enabled, is used to stamp the digital input states of the 8
digital inputs to the end of each scan as the scans occur in real time. The digital input status consists of 16 bits,
grouped into two 8-bit bytes: Bits 07-00 and 15-08, where Bits 15-08 are always inactive. Consequently, each of
the 8 Bits 07-00 is identified with a
1
signifying input on, or a
0
signifying input off, while each of the 8 Bits 15-08
is identified with a
0
(off).
In the following data formats, the digital input status will be stamped to each scan in the corresponding patterns:
•
Binary Low-High-Byte format: Two 8-bit Bytes 1 and 2, where:
Byte 1: Bits 07 through 00.
Byte 2: Bits 15 through 08.
•
Binary High-Low-Byte format: Two 8-bit Bytes 1 and 2, where:
Byte 1: Bits 15 through 08.
Byte 2: Bits 07 through 00.
•
ASCII format: Two 8-bit bytes in Binary format converted to eight bytes in printable ASCII format:
TxxxT000
, where:
T
= User terminator.
xxx
= Three-digit decimal value of Bits 07 through 00.
For more information on digital input stamping, see section Stamping Configuration in the section System
Configuration.
Note: In an 8-bit byte, Bits 00 through 07 correspond to digital input/output (DIO) lines 1 through 8. Also, Bit n
corresponds to the decimal value 2^n (where n is an integer from 00 to 07).
Note: If scan alarm stamping has also been enabled via the Set Scan Alarm Stamping (
A#
) command, then the
digital input states will be stamped after the scan alarm output states have been stamped.
Note: Data in Binary format is not printable. The Binary data must be converted to ASCII format for printability.
EXAMPLE
PRINT#1,"OUTPUT07;I#1X"
‘ Enable digital input stamping
PRINT#1,"OUTPUT07;I#0X"
‘ Disable digital input stamping