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3. SPECIFICATIONS
3 - 2
MELSEC
GOT
3.2 System monitor function specifications
3.2.1 PLC CPUs to be monitored
The PLC CPUs that allow system monitoring are the QCPU, QnACPU, ACPU,
FXCPU and motion controller CPU. For details, refer to Section 1.2 (2).
3.2.2 Access ranges to be monitored
For access range for the system monitor function, see GOT-A900 Series User’s
manual (SW4D5C-GOTR-PACKE compatible Connection system manual).
3.2.3 Names of devices to be monitored
For the names of devices that can be monitored with the system monitor function, see
GOT-A900 Series User’s manual (SW4D5C-GOTR-PACKE compatible Connection
system manual).
3.2.4 Precautions when using the system monitor function
The precautions to follow when using the system monitor function are shown below.
(1) Monitor and test of real number data
Real number data cannot be monitored or tested.
Monitoring of word devices that save real number data is all done by integer data
(binary data).
(2) Monitoring in 32-bit modules
When monitoring word devices (such as T, C, D, W) in 32-bit (2-word) modules,
monitor up to the point where 32 bits remain in the monitor processing. A location
where 16 bits (1 word) remain cannot be monitored.
This situation occurs when an odd number has been specified as the initial number
in the monitor device.
(Example) When monitoring the A2NCPU data register in 32-bit modules
beginning with an odd number (D1, D3...)
1017 1018 1019 1020 1021 1022 1023
Monitor displa
y
module Nothin
g
displa
y
e
d