User`s manual

118
Chapter 5 Remote Interface Reference
3488 Mode Commands
5
DREAD <slot><port>[,number of times to read]
Reads the current status of the DIO modules’ ports designated as inputs.
The decimal value read back is equal to the decimal sum of the bit values
that are set. When Slot 0 is specified, only Port 090 is valid.
The slot parameter is a decimal ranging from 0 to 9 (mainframe
dependent). Valid slot numbers are:
The port parameter is a number that indicates where the data is to be
read. The port is module dependent and the valid port numbers are shown
below.
If the DIO modules are using the Static Mode #1, this command will read
the input data. The DIO modules must be using Static Mode #2 for this
command to read the outputs.
The number of times to read parameter sets the number of times to read
the port. The 3499A/B/C must be in OLAP 1 mode (see page 123) and the
information is sent as a block with the readings separated by commas.If
no number of times to read is given, the specified port will be read one
time only. The maximum value of number of times to read is 32767.
3499A slots 0 through 5
3499B slots 0 through 2
3499C slots 0 through 9
Model Number 4-Bit Port 8-Bit Port 16-Bit Port 32-Bit Port
4-Bit Built-in DIO 090 N/A N/A N/A
44474A
16-Bit DIO
N/A s00, s01 s02 N/A
N2263A
32-Bit DIO
N/A s00, s01, s02, s03 s04, s05 s06
N2264A
Multifunction
N/A s30, s31 s32 N/A
N2265A
Multifunction
N/A s40, s41 s42 N/A