Siemens EH.85M.21E Instrukcja Użytkownika Pobierz pdf (Strona 10)

ST800 Guidance Notes

Page 10 667/HB/27000/100 Issue 1

Handset Introduction

Unlike the T400, no prompt is automatically displayed when the handset is first

connected to the controller.

The ST800 handset communications can work at either 1200, 9600 or 19200 baud

and therefore the controller waits for the operator to press ‘BackSpace’ (or ‘Delete’)

a few times so that it can determine what baud rate is being used.

Note that on the old-style 14 character Oyster handset, the first press of the ‘BS’ key

tells the Oyster to transmit and receive at 1200 baud. All key presses are ignored

until this key is pressed, making it appear like either the handset or the controller is

not responding.

Also note the ST800 defaults to producing 20 character wide displays on the

assumption that a newer 20 character by 4 line handset is being used, rather than

the older single line, 14 character handsets. This extra room allows the controller to

display more information within each handset command.

To reduce the display width back to 14 characters, simply enter ‘WID=14↵’.

The same command can be used to increase the display width, e.g. enter

‘WID=80↵’ when a PC / IPT is being used as a handset.

Setting the Date and Time

Entering ‘TOD’ now displays the date as well as the time.

If the display width has been reduced to 14 characters, then only the time is initially

displayed, and the ‘+’ key must be used to display the date and the day of week.

To set the time or date, simply press ‘=’ and enter time (or date) directly, there is no

need to use the T400 commands STM and CKL.

Note that the following keystrokes will still work on a 14 character terminal since the

date, time or day of week can all be changed while displaying any part of the time.

For example:-

Keystrokes Display

TOD↵

Mon01JAN90 00:03:25

= TOD=

TUE3MAR98↵

Tue03MAR98 00:03:32

= TOD=

11:35↵

Tue03MAR98 11:35:00

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Siemens EH.85M.21E Instrukcja Użytkownika Strona 10