1. BRX Technical Training
High-Speed I/O (Table-Driven Outputs)

2. High-Speed I/O BX10 BX10E 6 discrete IN (all high-speed)
4 discrete OUT (2 high-speed)
No analog IN
No analog OUT
No Ethernet port
BX10E
1 analog IN
1 analog OUT
Ethernet port

3. High-Speed I/O BX18 BX18E 10 discrete IN (all high-speed)
8 discrete OUT (4 high-speed)
No analog IN
No analog OUT
No Ethernet port
BX18E
1 analog IN
1 analog OUT
Ethernet port

4. High-Speed I/O BX36 BX36E 20 discrete IN (10 high-speed)
16 discrete OUT (8 high-speed)
No analog IN
No analog OUT
No Ethernet port
BX36E
4 analog IN
2 analog OUT
Ethernet port

5. High-Speed Outputs (Table-Driven Outputs)
TDO = Table Driven Outputs
Select Device Name & Output
TDO trigger high-speed outputs in response to:
High-speed Counters
High-speed Timers
Pulse Outputs
Use instructions to setup and manage:
TDOPRESET “Load Preset Table”
TDOPLS “Load Programmable Limit Switch”
TDODECFG “Deconfigure”

6. High-Speed Outputs (Table-Driven Outputs)
TDOPRESET “Load Preset Table for Table Driven Output”
Takes control of a TDO and loads a table of actions to be performed at specific count values
Once table is loaded, instruction has exclusive control of TDO
TDODECFG instruction must be used to cause instruction to relinquish control of the TDO
Table can be located in the instruction itself or in the PLC memory
If in the PLC memory, there is a configurator to aid in creating tables there
Each Preset Table can have up to 64 steps
Steps can use constants or variables (read when instruction is 1st enabled)
Reset the TDO’s structure member, .EnableOutput, to OFF to stop the table from writing its state data to the TDO

7. High-Speed Outputs (Table-Driven Outputs)
Conceptual Model of TDO control
of a real-world output
Y0 (in this example) is the real-world output being controlled
To take control away from the table, use a TDODECFG, then a different table can be used
TDOPRESET
(TDOPLS)
Step1
Step2
Step3
Step4 …
The .OutputState bit always shows what the table “wants” to do
The .EnableOutput bit is automatically ON when the input leg is triggered, but can be manually turned OFF to interrupt table control
Input leg triggers TDOPRESET (or TDOPLS) to take exclusive control of the real-world output

8. High-Speed Outputs (Table-Driven Outputs)
TDOPRESET “Load Preset Table for Table Driven Output” (details)
Select the TDO
Configure if necessary
Select Master Register
High-speed Ctr/Tmr Accumulator
Pulse Output 1-3 Position
Initialize .OffsetInputVal – current count value from the Master Register can be offset by a fixed amount before the comparison in the Step is performed by entering that offset value here

9. High-Speed Outputs (Table-Driven Outputs)
TDOPRESET “Load Preset Table for Table Driven Output” (continued)
Source Register Scaling
Raw Pulse Counts (no scaling)
Use Source Register Scaling – table values use the scaling of the Master Register
Load Raw Preset Table from Data Block – tells instruction the table exists in the PLC (must be online) & therefore not in the instruction itself
Table Start Address – must be signed double-word locations
Number of Preset Steps
Table Data Block Range – shows the range used
<PLC TDO Preset Table Editor…> - pulls up a dialog to help create the table in PLC memory

10. High-Speed Outputs (Table-Driven Outputs)
TDOPRESET “Load Preset Table for Table Driven Output” (continued)
Some Preset Functions require a Function Parameter:
Pulse ON (µSec)
Pulse OFF (µSec)
Data can be imported from a .CSV file

11. High-Speed Outputs (Table-Driven Outputs)
TDOPLS “Load Programmable Limit Switch Table for Table Driven Output”
Pairs of values are configured in a table that define a range of counts where the TDO is either ON or OFF (depending on the Default Output State)
Configuring the instruction is nearly identical to the TDOPRESET instruction with the exception of:
Defining the Default Output State (OFF/ON)
Graph showing entries of PLS table

12. High-Speed Outputs (Table-Driven Outputs)
TDODECFG “Deconfigure Table Drive Output”
Unloads the Preset Table or the PLS Table from a TDO and causes it to relinquish control

13. High-Speed Outputs (Table-Driven Outputs)
Structure Members of TDO:
.EnableOutput (bit; R/W) – automatically set ON when TDOPRESET or TDOPLS is executed; automatically reset OFF when TDODECFG is executed; manually reset to OFF to prevent a TDOPRESET or TDOPLS from writing to the TDO without having to execute a TDODECFG
.ResetLevel (bit; R/W) – set ON to hold the TDOPRESET to Step0
.ResetEdge (bit; R/W) – rising edge resets the TDOPRESET to Step0; instruction resets OFF to indicate the reset happened
.OutputState (bit; RO) – indicates what the TDOPRESET or TDOPLS table is “wanting” to do to the TDO; will happen if .EnableOutput is ON; will not if it is OFF
.StepNumber (signed byte; RO) – current active Step of the TDOPRESET or TDOPLS table
.InputValOffset (signed DWord; R/W) – the current count value from the Master Register (of TDOPRESET or TDOPLS) can be adjusted by a fixed amount before the comparison in the Step is performed by entering that offset value here