Clock Data Used By Cpu Module And Intelligent Function Module; Clock Data Used By Cpu Module; Clock Data Used By Intelligent Function Module - Mitsubishi MELSEC-Q Series User Manual

3
CONCEPT FOR MULTIPLE CPU SYSTEM

3.8 Clock data used by CPU module and intelligent function module

This section shows the clock data used by the CPU module and the intelligent function
module.

3.8.1 Clock data used by CPU module

The following shows the clock data used by the CPU module.
(1) Setting of clock data
High
Process
Basic Performance
Note3.5
Universal
UD
Note3.6
(2) Transmission of clock data

3.8.2 Clock data used by intelligent function module

Some intelligent function modules store an error code and time (clock data read from
QCPU) into the buffer memory when an error occurs.
The CPU No.1 time data will be stored as the time for the error regardless of whether the
module concerned is a control CPU or a non-control CPU.
Note5
High
Process
Basic Performance
Note3.5
Note6
Universal
UD
Note3.6
3
- 33 3.8 Clock data used by CPU module and intelligent function module
3.8.1 Clock data used by CPU module
When using the Universal model QCPU and the Motion CPU (Q172DCPU,
Q173DCPU) as CPU No.s 2 to 4, the clock data set to the CPU module of CPU No.1
is set to the CPU modules except CPU No.1.
When setting the clock data to the CPU modules other than the CPU module No.1,
the clock data of the CPU module No.1 is automatically set to them.
The CPU module No.1 sends the clock data to other CPU modules at the following
timing.
The clock data to be sent are year, month, day, day of week, time, minute and second.
• At power-on of Multiple CPU system
• When turing Multiple CPU system from RESET/STOP to RUN
• At 1-second interval after starting up Multiple CPU system
POINT
Since the CPU module No.1 sets the clock data at 1-second interval, error up to 1
second occurs to the clock data of CPU modules other than the CPU module
No.1.
When using the High Performance model QCPU and the Process CPU as CPU No.s 2 to 4, the
clock data of CPU No.1 cannot be set to other CPUs.
When using the Basic model QCPU, only the Motion CPU (Q172CPUN, Q173CPUN,
Q172HCPU, Q173HCPU) and the PC CPU module can be used as CPU No.s 2 and 3. The clock
data of the Basic model QCPU cannot be set to other CPUs. Set clock data of each CPU.
Since the Q02UCPU cannot use the Motion CPU (Q172CPUN, Q173CPUN, Q172HCPU, and
Q173HCPU) as CPUs No.2 and No.3, the clock data of the Q02UCPU is not set to the other CPU
modules. Set the clock data to each CPU module.
Note3.5
Note3.5 Note3.6
.Note5Note6