Honeywell Experion PKS User Manual Download Page 169

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option called Ignore extended diagnostic overflow (IGNOREXTDIAGOVRFLO) is provided in the

Slave

Status

tab to ignore extended diagnostic overflow and perform normal processing of diagnostic received.

For more information about RIO standards, refer to the RIO standard documents.

7.17.2 Configuring alarms

Perform the following steps to configure an alarm

Click the

Alarms

tab.

In the

Condition Description

column, enter a description for each condition.

The maximum length of the condition must be 32 characters. You can use special characters such as ".,/\
\<>'\"*?|:;[]{}()\ for defining the condition.

In the

Data Offset

column, enter the data offset byte (0 through 238) for each alarm condition. For example

if Dataoffset = 5, then parsing needs to be started from 5th byte of extended diagnostic data. The value 255
means that the data offset is not defined. Values 238 through 254 are not useful to data offset because they
do not match with any extended diagnostic data. However, having value 238 through 254 does not cause any
errors.

In the

Indication Bit

column, enter the indication bit (0 through 7) from where multibit processing needs to

be performed for each alarm condition.Value n = Bit n in byte represented by data offset. For example if
parsing needs to be started from bit 3 of byte 5 of extended diagnostic data, then DataOffset = 5 and Bit
offset = 3.

In the

Indication Bit Field

column, enter the number of bits that you want to parse from this bit. By default,

this parameter value is 1 and the maximum value that can be entered for this parameter is 32. By the virtue
of value entered in this field, you can have single bit, multi bit, and multi byte parsing of extended
diagnostic data for value. For example,
• Single bit processing: If you want to process single bit of extended diagnostic for alarming, then the

value of the Indication Bit Field = 1. If you want to process 3rd bit of 5th byte in extended diagnostic
data, then DataOffset = 5, Indication bit = 3, Indication Bit Filed =1.

• Multi bit processing: If you want to process multi bit of extended diagnostic data, then the value of the

Indication Bit Field must be greater than 1. If you want to parse from bit number 3 to bit number 5 of 5th
byte in extended diagnostic data, then DataOffset = 5, Indication Bit = 3 and Indication Bit Field = 3.
Indication bit 3 and bit field 3 means starting bit 3, 3 bits (bit 3, bit 4 and bit 5) will be parsed for value.

• Multi Byte processing: If you want to parse 32 bits starting bit number 4 of 5th byte of extended

diagnostic, then DataOffset = 5, Indication Bit = 4, and Indiciation Bit Field = 32.

In the

Comparison Operator

column, select the comparison operator with which you want to compare the

data offset value and the reference value. Default value of this parameter is “Equals.”

In the

Reference Value

column, enter a value that you want to have as a reference value for comparison.

Default value of this parameter is 1.

In the

User Condition PDC

column, enter the PDC number that you want to set the status based on the

alarm condition. This parameter defines whether one/none/all PDCs will be affected when a configured user-
defined alarm is active. Default value of this parameter is 255. The possible values of this parameter are as
follows:
• 254 - This means all PDCs in the DSB will be affected when this user configurable alarm is active.
• 255 - This means none of the PDCs in the DSB will be affected when this user configurable alarm is

active.

• 0.. MAXPDCNUMBER - In this case, this parameter holds a valid PDC number. The PDC number

mentioned will get affected when configured alarm is active.

Attention

For GENDSB migrated from R400 to R410, the value of this parameter is 255.

7 DEVICE SUPPORT BLOCK (DSB)

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