Mitsubishi Q00JCPU User Manual page 322

6
FUNCTIONS
6
6.14 Sampling Trace Function
- 81
POINT
1. The SRAM card is required to store the trace data and trace results.
After mounting the SRAM card to the High Performance model QCPU,
execute sampling trace.
2. Sampling trace is not executed if the Flash card or ATA card is installed,
because the cards cannot store the trace data and trace results.
(a) When sampling trace is executed
The execution status of the sampling trace function is stored in the special relay
(SM800, SM802, SM804 and SM805).
If an error occurs while the sampling trace function is used, SM826 turns on. By
using special relays in a sequence program, the execution status of the sampling
trace function can be checked.
1) Preparations for sampling trace
After the "trace data" and "trace conditions" set using GX Developer are
written to the CPU module, SM800 (sampling trace ready) turns on. SM800
indicates whether the sampling trace can be executed or not.
2) Start of sampling trace
When a sampling trace start request is accepted, the sampling trace starts and
SM802 (sampling trace executing) turns on. SM802 indicates whether the
sampling trace is executed or not.
• A trace from GX Developer starts.
• SM801 is turned on.
3) Checking the trigger conditions
When a next trigger condition is satisfied, SM804 (after sampling trace trigger)
turns on. SM804 indicates whether the trigger conditions are satisfied or not.
• A trigger from GX Developer executed.
• The TRACE instruction is executed.
• SM803 is turned on.