User manual

IEC61131 User and Reference Manual
April 22, 2008
603
Unprotected Read
The Unprotected Read function reads 16-bit values from any area of the I/O database of the
slave device. Access to the I/O database is limited to the unprotected address range of the
slave device. Data can be written into any area of the master I/O database within its
unprotected address range.
Any number of 16-bit registers may be read up to the maximum number supported by the
slave device or the maximum number above, which ever is less. The read may start at any
16-bit register, provided the entire block is within the unprotected address range of the slave
device.