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APPENDIX
App - 4
(5) Maximum number of tasks
The maximum number of tasks that can be run simultaneously is as shown below.
Maximum number of
tasks
In the QD51 (-R24), a maximum of 2 BASIC programs can be run at a time.
(6) PCRD/PCWT command
The processing codes shown below cannot be executed with respect to the
Q/QnA CPU. Replace those codes which can be replaced.
(a)
PCRD commands
Processing codes used in the A1SD51S/AD51H-S3
Contents
Monitoring of the device monitor register by
the PCWT command
Reading of expansion file register data
Monitoring the expansion file register monitor
registered by the PCWT command
Reading of continuous address designation
data in the expansion file register
Reading of sequence programs
Reading of microcomputer programs
Reading of comment data
Reading of expansion comment data
Reading of the special function module buffer
memory
Reading of programmable controller CPU
model name
Reading of parameter data
(Reading of MELSECNET/10 parameters)
Reading of network information
Reading of routing parameters
AD51H-S3
A1SD51S
8
Processing Code
2(&H2)
4(&H4)
5(&H5)
7(&H7)
8(&H8)
9(&H9)
10(&HA)
11(&HB)
12(&HC)
13(&HD)
14(&HE)
21(&H15)
22(&H16)
MELSEC-Q
QD51(-R24)
2
2
Treatment
Reading of Q/QnA series device memory
Processing code 515 (&H203)
Cannot be used in the Q/QnA Series
Cannot be replaced
Reading of Q/QnA series intelligent
function module buffer memory
Processing code 533 (&H215)
Reading of Q/QnA series programmable
controller CPU model name
Processing code 513 (&H201)
Cannot be used in the Q/QnA Series
Cannot be replaced
App - 4
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