Plc Output Words: Plc Data; Module; Wy5 = Pointer To V-Memory; Wy6 = Pointer To V-Memory - Siemens SIMATIC 505 User & Programmers Manual

2.4

PLC Output Words: PLC Data

2.4.1
WY5 = Pointer to
V-memory
2.4.2
WY6 = Pointer to
V-memory
2.4.3
WY7 = Module
Mode Control
2.4.4

WY8 = Start Cycle

WY5 contains the V-memory start location for the profile download of the
data table to the module. For example, WY5 = 101 means download table
begins at V-101.
Zero is not a valid value.
Max value = PC V-memory max—300 or 65315 max.
WY6 contains the V-memory start location for the upload of the process
variable data table to the PLC. For example, WY6 = 400 means the upload
table begins at V-400.
Zero is not a valid value.
Max value = PC V-memory max—100 or 65440 max.
WY7 contains the module mode control value as follows:
An integer value of 1121 in WY7 = run and enable special function (SF)
transfers. All other values = disable run mode and lock out SF transfers.
An integer value of 5000 in WY7 = the software revision display
command that forces WX1 to display the current software revision (Rev.)
number.
A transition from zero to a non-zero value in WY8 is required to execute a
profile. A transition from a non-zero to a zero value is required to reset an
error condition and to set up to start another cycle.
For example, the binary value 1111 1000 0000 0000 in WY8 tells the module
to run a complete cycle with everything in closed loop mode. The module
looks only at the first 5 bits of the WY8 word for the start, stop, and reset
functions. Therefore, only the first 5 bits need to be zero to stop or reset this
cycle.

Module

Software Interface 2-9