Nidec H300 - Binary Inputs; Binary Input Points; Binary Input Point Attributes; Binary Input-Object Configuration Byte

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188 HVAC Drive H300

Issue Number: 3

Alarm and Warning Limits

The alarm/warning limits are returned as 32-bit (4 byte) IEEE floating point numbers. To implement a working alarm/warning system, enter

appropriate values (in percent of full scale) into the four alarm/warning limit values. These four points can be read and written, see attributes 8, 9, 10

and 11 in Table 10-26.

10.5.3 Binary Inputs

Binary Input points are drive bit parameters (byte) that are read-only. Binary Input cannot be written to; they may be "overridden" it if desired. Note

that Binary Inputs, being read-only, cannot be updated on the drive. In this case, overriding a binary input will only change what the Metasys network

sees as the value of that point.

Binary inputs are allocated point numbers in the numerical order in which they are defined on their respective option module. Drive binary inputs are

allocated first followed by any binary inputs on the option module in slot 1 (if fitted) and then any on the module in slot 2 (if fitted).

Table 10-30 Binary input points

Each binary input point has two attributes that can be read and updated:

Table 10-31 Binary input point attributes

Object configuration

The Binary Input Object Configuration byte has the following format:

Table 10-32 Binary input- object configuration byte

It is possible to read and write to the Object Configuration byte.

Setting the "COS Enable" bit will enter this point into the set of points to be scanned for change whenever a "Poll without Acknowledge" command is

received.

The "Normal State" bit serves as a reference for alarm checking. If the "current state" in the status attribute is different from the "Normal State" bit and

the alarms have been enabled, then the "Normal/Alarm" bit in the status will be asserted.

Setting the "Alarm Enable" bits will cause an alarm check to be performed whenever this point is read (status or current value) which may then set the

COS normal/alarm bit in the status byte.

Object Status

The Binary Input Object Status byte has the following format:

Table 10-33 Binary input object status byte

The "Reliable/Unreliable" bit will be set if the binary input is not set as input (point 3-5 only).

The "Override Active" bit will be set if a binary input point is overridden. This indicates that the current state being read is an "override" and does not

reflect the value existing in the drive. This action would normally be done during testing of the Metasys building automation network. The only way to

clear the "override active" bit is to issue an "Override Release Request" command for this point.

The "Normal/Alarm" bit will set if the "Current State" does not match the "normal state" in the Object Configuration attribute and the "alarm enabled"

bit is set in the Object Configuration attribute.

Point Parameter Description Access

0Pr 06.022 Filter change required RO

1Pr 10.001 Drive healthy indication RO

2Pr 10.019 Drive warning/alarm state RO

3Pr 08.001 Digital Input 1 on drive (bi-directional) RO

4Pr 08.002 Digital Input 2 on drive (bi-directional) RO

5Pr 08.003 Digital Input 3 on drive (bi-directional) RO

6Pr 08.004 Digital Input 4 on drive RO

7Pr 08.005 Digital Input 5 on drive RO

8Pr 08.006 Digital Input 6 on drive RO

9Pr 08.009 Drive enable state RO