xxiv
Upgrades Made to New Version of CQM1H CPU Units 7
When switching a load with a high inrush current such as an incandescent
lamp, suppress the inrush current as shown below.
7 Upgrades Made to New Version of CQM1H CPU Units
The following changes in specifications apply to all CQM1H CPU Units manu-
factured on or after 1 June 2000 (manufacturing number 0160). Check the
manufacturing number of your CPU Units to see if these specifications apply.
7-1 Reading Manufacturing Numbers
7-2 Changes in Specifications
Change to Settings of Pin 7 on DIP Switch
It is no longer necessary to set the device being connected to the peripheral
port using the setting of pin 7 on the front panel DIP switch. The setting of pin
7 is ignored and the device connected to the peripheral port (e.g., a Program-
ming Console or personal computer running Programming Device software)
will be automatically detected.
Front Panel DIP Switch
Effect of Pin 5 and Pin 7 on Peripheral Port
Note The setting of pin 7 is ignored. Leave it at the factory setting.
OUT
COM
R
OUT
COM
R
Countermeasure 1
one-third of the rated value through
an incandescent lamp
Countermeasure 2
Providing a dark current of approx. Providing a limiting resistor
0 1 6 0
â–²
â–²
â–²
Rightmost digit of year (2000 = 0)
Month (1 to 9 = Jan to Sept, x to z = Oct to Dec)
Day of month (01 to 31)
Pin 7 OFF The setting of pin 7 has no special function.
Leave it at the factory setting.
Factory setting: ON
ON
Front panel DIP
switch
Peripheral port operation
Pin 5 Pin 7 Programming Console con-
nected
Device other than Programming
Console connected
OFF OFF/ON Programming Console Operation according to PLC
Setup in DM 6650 to DM 6654
ON OFF/ON Programming Console Operation according to standard
settings
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