Error conditions – West Control Solutions N8080 (for 1xxx) User Manual

Page 14

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3.4

ERROR CONDITIONS

If a slave device detects a syntax error or parity error, it will not reply to the

message; the master device should make up to two retries, applying the

two-second No Reply timeout in each case.

Parameter Read operations with parameter identifiers which are in the legal

range but which are not applicable to the addressed instrument will have no

effect on any parameter values and a positive acknowledgement will be

returned.

Parameter Write operations with parameter identifiers which are outside the legal

range will be considered to be syntax errors; no reply will be generated.

Parameter Write operations in which the specified parameter is valid but the

specified value is invalid will generated a negative acknowledgement.

3-4

Volume I

OM090-3

59135

Identifier Hex.

Parameter

Adjustment Range

:

3A Process Variable

Read Only (

19999 to 9999)

<

3C Maximum Process Variable Read Only (

19999 to 9999)

=

3D

Minimum Process Variable

Read Only (

19999 to 9999)

>

3E Elapsed Alarm 1 Time

Read Only (0 to 60000)

@

40 Reset Max. PV

Write resets; Read always 0

A

41 Reset Min. PV

Write resets; Read always 0

B

42 Reset Elapsed Alarm 1 Time Write resets; Read always 0

D

44 Reset Latched Alarm 1

Write resets; Read always 0

E

45 Alarm 1 value

Range Max. To Range Min.

F

46 Alarm 2 value

Range Max. To Range Min.

]

5D Re-transmitted Scale Min.

19999 to Re-trans. Scale Max.

^

5E Re-transmitted Scale Max.

Re-trans. Scale Min. To 99999

_

5F

Process Variable Offset

0 to Range Span

60 Input Filter

0 to 1000 (0.0 to 100.0s)

a

61 Colour

0 to 3 (0 = Red, 1 = Green,

2 = Green/Red, 3 = Red/Green)

b

62 Alarm Lock

0 (lock enabled), 1 (lock disabled)

c

63 Help level

0 (Help enabled), 1 (Help disabled)

Table 3-1 Parameter Identifiers and Adjustment Ranges

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