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11. PRINTER FUNCTIONS
MELSEC-A
11.2 Precautions Before Programming
This section gives the precautions to take before starting the programming to
use a printer function.
11.2.1 Free messages and fixed messages
Free messages, registered in the buffer, contain variable data (such as data
in a data register).
Fixed messages, registered in the EEPROM, contain fixed data (such as table
frames and model names).
Creating a table: example
Register the table frame and model as fixed messages.
I
Model
I
Check
Results
I
Then, register the check results as free messages.
0.K
Fault
For example, the following table can be created by using fixed messages
and free messages.
I
Model
Check
Results
I
A1 SJ71 C24-R2
0. K
AZACPU
I
Fault
I
11.2.2 Precautions when using a printer function
(1) Turning OFF the printer after connecting the AlSJ71 C24-PRF to a printer
Turning OFF the printer after connecting the AlSJ71C24-PRF to the
printer during a parity check will cause a parity error.
(2) CD terminal checkedlnot checked designation
CD terminal checkedlnot checked designation must be done in accord-
ance with the printer specifications (see Section 7.1).
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