Rockwell Automation 20-COMM-H RS485 HVAC Adapter FRN 2.xxx - Manual (Page 84)

B-2 Adapter Parameters
20-COMM-H RS-485 HVAC Adapter User Manual
Publication 20COMM-UM009D-EN-P
09 [Stop Bits Act]
Displays the actual number of stop bits used by the
selected protocol.
This value is network-dependent:
•
ModBus RTU Protocol – The number of stop bits
used depends on the value set by Parameter 30 -
[Stop Bits Cfg].
•
Metasys N2 Protocol – Uses only 1 bit, so the
adapter shows only this value.
•
Siemens Building Technologies P1 FLN Protocol –
Uses only 1 bit, so the adapter shows only this value.
Default: 0 = 1-bit
Values: 0 = 1-bit
1 = 2-bits
Type: Read Only
10 [Net Chksum Type]
Displays the type of checksum used by the selected
protocol. The value is network dependent:
•
Modbus RTU Protocol – Uses CRC16 (-1) which is
Cyclic Redundancy Check with -1 as a seed value.
•
Metasys N2 Protocol – Uses RLC which is Run
Length Checksum.
•
Siemens Building Technologies P1 FLN – Uses
CRC16 (0) which is Cyclic Redundancy Check with 0
as a seed value.
Default: 0 = CRC16 (0)
Values: 0 = CRC16 (0)
1 = RLC
2 = CRC16 (-1)
Type: Read Only
11 [Network Timeout]
Configures the time in seconds to be used to detect
network communication loss.
Default: 10 seconds
Minimum: 0 seconds
Maximum: 180 seconds
Type: Read/Write
Reset Required: No
12 [Ref/Fdbk Size]
Displays the size of the Reference/Feedback. The
drive determines the size of the Reference/Feedback.
Default: 0 = 16-bit
Values: 0 = 16-bit
1 = 32-bit
Type: Read Only
13 [Datalink Size]
Displays the size of each Datalink word. The drive
determines the size of Datalinks.
Default: 0 = 16-bit
Values: 0 = 16-bit
1 = 32-bit
Type: Read Only
14 [Reset Module]
No action if set to “0” (Ready). Resets the adapter if set
to “1” (Reset Module). Restores the adapter to its
factory default settings if set to “2” (Set Defaults). This
parameter is a command. It will be reset to “0” (Ready)
after the command has been performed.
Default: 0 = Ready
Values: 0 = Ready
1 = Reset Module
2 = Set Defaults
Type: Read/Write
Reset Required: No
Parameter
No. Name and Description
Details
!
ATTENTION: Risk of injury or equipment damage exists. Parameter 11 -
[Network Timeout] lets you determine how long it will take your adapter to detect
network communication losses. By default, this parameter sets the timeout to ten
seconds. You can set it so that the duration is shorter, longer, or disabled. Take
precautions to ensure that the setting does not create a risk of injury or equipment
damage. When commissioning the drive, verify that your system responds
correctly to various situations (for example, a disconnected cable).
!
ATTENTION: Risk of injury or equipment damage exists. If the adapter is
transmitting I/O that controls the drive, the drive may fault when you reset the
adapter. Determine how your drive will respond before resetting a connected
adapter.