Automation Tab
Revised 2017-08-31
I/O Settings (RAM-9000 Models)
Drawing No. LP0997-C
- 220 -
Sixnet
®
Series SN/RAM
®
6000 & RAM 9000 Software Manual
Discrete Output
Click on the
Discrete Output
button and the following dialog window appears:
TPO period (ms):
Time Proportioned Outputs (TPO) are outputs that turn on and off in proportion to an analog
value. Typically, the output will turn on and off once during the specified TPO period (cycle time).
Specify a cycle time for all enabled TPO outputs in the module. The range of the cycle time is 20ms to 10
minutes (600,000ms). Each TPO will pulse ON and OFF once during each cycle period, unless a minimum
OFF/ON time is specified. The default TPO period value is 1000ms.
Min OFF/ON (ms):
Specify a minimum OFF/ON time (shortest allowable ON or OFF pulse) if the output
devices are not capable of changing stat within 1/32767 of the desired time. (Mechanical relays are an
example of such a device).
The range for the minimum OFF/ON time is 10ms to 10 minutes. All settings will maintain the time proportion
by waiting multiple cycle times, if needed, to turn an output ON or OFF. The default value for this field is 100ms.
Channel:
A channel is a physical I/O point that can be either analog or digital.
Modbus Address:
Configuration must be sequential. Addresses are fixed sequentially from the base address.
Mode:
This option will enable/disable the discrete output channel.
TPO:
Select the Enable Time Proportioned Outputs (TPO Disabled/Enabled) in the drop down list, if it is
desirable to have any discrete outputs in this module function as time proportioned outputs. All discrete outputs
support this TPO capability. Each channel can function as a TPO output or a discrete output, but not both. If
TPO is enabled, the TPO period, Min. OFF/ON and TPO IODB/Modbus address must be configured as well.
The analog value associated with each channel will control how long the TPO will be ON or OFF (16-bit value
from 0-32767). For example, an analog value of zero will tell the output to be OFF. A value of 3276 (10% of
32767) will turn the output on for 10%of the “TPO Period” value. 32767 (full scale) will control the output to be
ON at all times except for Min OFF/ON time.
TPO Modbus Address:
This field indicates the register addresses of the analog outputs that control the TPO’s
when enabled. Configuration must be sequential. Addresses are fixed sequentially from the base address.