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Note: The address counter (ACC) is automatically incremented or decremented by 1 after the write
instructions to CG-RAM or DD-RAM are executed. The RAM data selected by the ACC cannot
be read out at this time even if read instructions are executed. Therefore, to correctly read data,
execute either the address set instruction or cursor shift instruction (only with DD-RAM), then
just before reading the desired data, execute the read instruction from the second time the read
instruction is sent.
7. 0PERATING RECOMMENDATIONS
7.1 Avoid applying excessive shock or vibration beyond the specification for the VFD module.
7.2 Since VFDs are made of glass material, careful handling is required.
i.e. Direct impact with
hard material to the glass
sur
face (especially exhaust tip) may crack the
glass.
7.3 When mounting the VFD module to your system, leave a slight gap between the VFD glass and
your front panel. The module should be mounted without stress to avoid flexing of the PCB.
7.4 Avoid plugging or unplugging the interface connection with the power on, otherwise it may cause
the severe damage to input circuitry.
7.5 Slow starting power supply may cause non-operation because one chip Mico won’t be reset.
7.6 Exceeding any of maximum ratings may cause the permanent damage.
7.7 Since the VFD modules contain high voltage source, careful handing is required during
powered on.
7.8 When the power is turned off, the capacitor dose not discharge immediately.
The high voltage applied to the VFD must not contact to the ICs. And the short-circuit
of mounted components on PCB within 30 times the specified current consumption when the
power is turned on.
7.9
The power supply must be capable of provid
ing at least 3 times the rated current, because the
surge current can be more than 3 times the specified current
consumption when the power is
turned on.
7.10
Avoid using the module where excessive noise interference is expected. Noise may affects the
Interface signal and causes improper operation. And it is important to keep the length of the
interface cable less than 50cm.
7.11
Since all VFD modules contain C-MOS ICs, anti-static handing procedures are alw
ays
required.
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