Hp 6627A Instrukcja Użytkownika Pobierz pdf (Strona 39)

Getting Started 39

OUTPUT

The HP BASIC language statement that addresses the power supply to talk and reads back data from the power supply is:

ENTER

The supply's front panel ADDR annunciator is on when the supply is addressed to talk or to listen.

Reading the HP-IB Address

Before you can operate your power supply remotely, you need to know its HP-IB address. The address was displayed

during the power on sequence described in Normal Self Test Indications, page 35. To see the address, press:

ADDR

A typical address display is shown in Figure 3-6:

Figure 3-6. Typical Address Display

The displayed response is the power supply's HP-IB address. When sending a remote command, you append this address

to the computer's HP-IB interface select code (normally 7). For example, if the select code is 7 and the power supply's HP-

IB address is 5, the combination is 705.

Changing the HP-IB Address

NOTE All examples in this discussion assume an HP-IB address of 5. It is recommended that you retain this

address to simplify programming.

Every device on the HP-IB must have an address. The supply's address is factory set to decimal 5. Any address from 0

through 30 is a valid address. If you need to change the HP 662xA Supply's address press:

ADDR

You can now enter a new address. For example, press:

1 4 ENTER

You have now changed the address from 5 to 14. If you want to change the address back to 5, repeat the above procedure

but use 5 instead of 14 in the last step. Note that the address is stored in the power supply's non-volatile memory and

therefore will be retained through interruption of the ac line power.

Sending a Remote Command

To send the power supply a remote command, combine your computer's output statement with the HP-IB interface select

code, the HP-IB device address, and finally, the power supply command. For example, to set the output voltage of output

channel 1 to 2 volts, send:

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 114 115

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Hp 6627A Instrukcja Użytkownika Strona 39