
CHAPTER 38
Data exchange area
405.1200.037.2 - Rel.: 2.21 of 25/02/2008
38-4
Table 38.1: Meaning of bits of Word 0 - Status word
WORD 0
MEANING OF THE BIT
BIT NUMBER
VT
50
VT
60
VT
130
W
VT
150
W
VT
160
W
VT
170
W
VT
190
W
VT
300
W
VT
310
W
VT
320
W
VT
330
W
WATCHDOG
Always at Status1
0
0
0
0
0
0
0
0
0
0
0
EDIT MODE
Status 1 when il terminal is in mode for changing fields
1
1
1
1
1
1
1
1
1
1
1
MESSAGES PRESENT
Status 1 so long as there is a message to display
2
2
--
2
2
--
--
--
--
--
--
MESSAGE PENDING
Status 1 so long as there is a message “in” but not yet consulted
3
3
--
3
3
--
--
--
--
--
--
ISA ALARM MESSAGES PRESENT
Status 1 so long as there is an alarm message to display
--
--
2
--
--
2
2
2
2
2
2
ISA ALARM MESSAGES PENDING
Status 1 so long as there is an ISA alarm “in” but not yet
acknowledged
--
--
3
--
--
3
3
3
3
3
3
COMMAND NOT VALID
Status 1 when the last command sent by the device has not been
carried out
4
4
4
4
4
4
4
4
4
4
4
ALARM HISTORY BUFFER 80% FULL
Status 1 when the alarm history buffer is 80% full and therefore
close to saturation
--
--
5
--
--
5
5
5
5
5
5
ALARM HISTORY BUFFER FULL
Status 1 when the alarm history buffer is full and can hold no
more alarms
--
--
6
--
--
6
6
6
6
6
6
MACRO FUNCTION ACTIVE
Status 1 when the VT is processing a macro function
--
--
7
7
7
7
7
7
7
7
7
BATTERY FLAT
Status 1 when the battery is near its minimum level for maintain-
ing the data in the RAM memory
--
--
--
--
--
8
8
8
8
8
8
-- : not present
Table 38.2: Meaning of value contained in the Word 1 - Sequence Identifier
WORD 1
MEANING OF THE VALUE
USED
VT
50
VT
60
VT
130
W
VT
150
W
VT
160
W
VT
170
W
VT
190
W
VT
300
W
VT
310
W
VT
320
W
VT
330
W
SEQUENCE IDENTIFIER
Contains a value other than zero if in Project Page context, but
contains zero if in any other context
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Содержание VT130W
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