Filter
Top Products
FS-8700-17 Optomux Driver Manual
FieldServer Technologies 1991 Tarob Court, Milpitas, California 95035 (408) 262-2299 fax: (408) 262-9042
Visit our website: www.fieldserver.com E-mail: support@fieldserver.com
Page 8
Opto22_trigger* An optional parameter. If used then set the
value of this parameter to yes or no and
the da_byte_name parameter must be
specified too.
When this parameter is set to yes then the
Optomux driver processes this map
descriptor differently from a normal wrbc or
rdbc function.
The driver processes the map descriptor at
the scan interval specified. Each time that
it is processed the driver checks the
element of the da_byte_name data array
specified. If the value of the 1
st
element of
array located at data_array_offset is 1 then
the driver executes the command. If the
value is not equal to one then the driver
ignores the map descriptor.
If the map descriptor is triggered then the
driver will write a response status to the
same data element on completion of the
poll. Thus the value of 1 will be set to zero
for success or some other value indicating
an error.
More information is provided in chapter 6.
No, Yes
Opto22_format* This parameter only has meaning when
the function is a read of digital data.
By default the OPTO22 devices returns 16
position states when digital data is read (
eg. READ STATUS). The Optomux driver
writes the data as one 16 bit unsigned
integer to one data element of the data
array specified. (That is, the data is written
to the data array in packed bit format.)
For example, if the 1
st
and 5
th
inputs were
on and all others were off the driver would
write the value 17 to the first element of the
data array.
The driver can be instructed to unpack this
data into separate bit states, writing each
module position’s state to a consecutive
data array element.
When the Bit keyword is used the driver
sets the states of consecutive data array
elements starting at Data_Array_Offset.
The number of elements that are written is
determined by length and a maximum of
16 elements will be written.
Bit, Packed
Opto22_function This parameter is specified by using one of See Table 6.1