Specifications

IP 240 Direct Data Interchange with the IP 240
Table 11-1. Contents of the Status Register
Bit Abbr. Meaning when bit is ”1”
Job terminated,
The job request was serviced without error.
Job request acknowledged,
The IP 240 acknowledged recogniton of a job request (can be evaluated
following RESET only).
Data ready,
The data requested was entered in or fetched from the transfer buffer.
0 AFRT
1 AERK
2 DFRT
ERRor,
An error has been flagged on the IP 240 and must be read out and analyzed.
4 ERR
IDLE state,
Channel 1 not configured.
5 IDLE1
IDLE state,
Channel 2 not configured.
6 IDLE2
IP 252 expansion,
Both channels configured for IP 252 expansion mode.
7 IP252
Note
In Sections 11.2 and 11.3 you will find detailed information on interchanging data
with the IP 240. Failure to observe the rules and conventions presented in these
sections (e.g. no wait for the relevant bit in the status register) may result in errors
both in the data transfer currently in progress as well as in the next exchange of
data with the IP.
EWA 4NEB 811 6120-02a 11-3