Exfo FTB-2 User Manual download pdf (Page 248)

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101

Using Your Unit and Modules in an Automated Test Environment

238 FTB-2 and FTB-2 Pro

Standard Status Data Structure

Each device that is physically connected to the remote bus has four status

registers with a structure complying with the IEEE 488.2 standard. These

registers allow the controller to monitor events and get useful information

on the status of the devices it controls.

 Standard Event Status Register (ESR)

 Standard Event Status Enable Register (ESE)

 Status Byte Register (STB)

 Service Request Enable Register (SRE)

ESR and ESE

The standard event status register and status enable register information is

presented in the following table.

Bits Mnemonics Bit Value

7 Power On (PON) 128

6User Request (URQ) 64

5 Command Error (CME) 32

4 Execution Error (EXE) 16

3 Device-Dependent Error (DDE) 8

2 Query Error (QYE) 4

1 Not Used (N.U.) 0

0 Operation Complete (OPC) 1

1 2 ... 243 244 245 246 247 248 249 250 251 252 253 ... 442 443

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Exfo FTB-2 User Manual Page 248

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