Mitsubishi Electric MELSEC-Q series Programming Manual page 79

• The initial screen display request, designated by
make the initial screen display request, set "0" for
displayed unless the initial screen display request is executed.
• After the initial screen is displayed, the value designated by
monitor function is executed. If the device designated by
file register ON. If the memory protect function is ON, the screen cannot display the monitor data correctly.
• The initial screen display request should only be executed once in response to the first PID57 instruction after the start of
QnACPU operation. If it is executed every scan, the bar graphs and numeric data will not be displayed, although the
characters in the still portion are displayed.
• To monitor PID control status with the AD57(S1), a character generator ROM and canvas ROM must be loaded to the
AD57(S1). The characters shown in Figure 9.1, corresponding to character codes 000 to 00BH, must be created in the
character generator ROM. If these characters are not created, bar graphs cannot be displayed. Refer to the following
manuals for details on creating the character generator ROM and canvas ROM.
 SW1GP-AD57P Operating Manual
[OPERATION ERRORS]
An operation error will occur and the error flag (SM0) will be turned ON, and an error code will be stored in SD0, in the
following cases.
Error code Description
2110 When the CMODE instruction has not been executed for AD57(S1).
4103 When the PIDINIT(P) instruction has not been executed before the PID57 instruction.
4103 When the PIDCONT(P) instruction has not been executed before the PID57 instruction.
4100 When the screen number designated with
, displays the characters in the still portion of the monitor screen. To
S2
. Characters besides the bar graphs and numeric data will be not
S2
S1
is a file register, do not set the memory protect function for the
S2
is outside the range of 1 to 4.
S1
9 COMPLETE DERIVATIVE PID CONTROL INSTRUCTIONS AND PROGRAM EXAMPLES
is automatically stored in
S2
9.1 PID Control Instructions
and then the PID control
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