Download MELSEC-ST Thermocouple Input Module User`s Manual

3 SPECIFICATIONS
MELSEC-ST
3.4 Memory and Parameters
This section explains the memory and parameters of the ST1TD2.
3.4.1 Memory
RAM and ROM are available as the parameter storage memory of the ST1TD2.
(1) RAM
(a)
The ST1TD2 operates based on the parameter settings stored in the RAM.
(b)
The parameter settings stored in the RAM become valid when the Bw.n+1
convert setting request turns from OFF to ON.
(2) ROM
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(a)
The ROM stores the parameters. The stored parameters are not erased at
power-off.
(b)
The parameters stored in the ROM are transferred to the RAM when:
• The MELSEC-ST system (ST1TD2) is powered off, then on.
• The head module is reset.
• Parameter setting ROM read (command number: 3300H) is executed.
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