HP 132A User Manual download pdf (Page 294)

Chapter 4 Command Reference

*ESR?

(Event Status Register Query)

4-128 Programming Guide

*ESR?

(Event Status Register Query)

*ESR?

Queries the Standard Event Status Register, shown in Figure 4-5.

This event register captures changes in conditions, by having each event bit

correspond to a specific condition in the instrument.

An event becomes TRUE when the associated condition makes the defined

transition. The event bits, once set, are “sticky.” That is,

they cannot be cleared even if they do not reflect the current status of a related

condition, until they are read.

This register is cleared by *CLS, by *ESR?, and at power-on.

Note that the instrument’s power-on sequence initially clears the register, but then

records any subsequent events during the power-on sequence including setting the

PON (power on) bit.

Figure 4-5. Standard Event Status Register

See the section titled “Standard Event Status Register Group,”

page 3-24, in Chapter 3 of this guide for a detailed description of the Standard

Event Status Register.

• Numeric data transferred as ASCII bytes in <NR1> format.

• Range is 0 to 255.

• The query response is an integer formed by the binary-weighting of the bits.

The value of unused bit is zero.

Query Response

1 2 ... 289 290 291 292 293 294 295 296 297 298 299 ... 329 330

No comments

HP 132A User Manual Page 294