User manual

IEC61131 User and Reference Manual
April 22, 2008
386
Input and Holding Registers
Input and holding registers contain 16 bit values.
Writing any value to a general purpose register stores the value in the register. Writing a
value to an assigned register, writes the value to the assigned I/O module.
Reading a general purpose register returns the value stored in the register. Reading an
assigned register returns the value read from the I/O module.