BRX Technical Training

1. BRX Technical Training High-Speed I/O (Counters & Timers)

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

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

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

5. High-Speed I/O • High-Speed Inputs • Counter • Timer • High-Speed Outputs • Axis/Pulse Out • Step/Direction • CW/CCW • Quadrature • PWM Outputs • Table Driven Outputs

6. High-Speed Inputs (Up Counter) • Default Device Name: @HsCtrTmr1, 2& 3 • Default Structure:$HsCtrTmr1, 2 & 3 • Up Counter – increments on edge • Rising, falling, both • Requires 1 onboard input • Regular-speed inputs can be used here but most counting would require high-speed inputs

7. High-Speed Inputs (Up Counter) • Up Counter ($HsCtrTmr1, 2 & 3) Structure members: • .Acc(signed double-word; RO) – count value • .AtResetValue(bit; RO) – indicates .Accis at reset value • .ResetLevel(bit; R/W) – set ON to hold .Accto the reset value • .InhibitCount(bit; R/W) – set ON to stop.Accfrom counting pulses • .ResetEdge(bit; R/W) – rising edge resets.Accto the reset value • .ResetValue(signed double-word; R/W) – reset value • .ScaledValue(real; RO) – only relevant if scaling is configured (next slides) • .EnableCapture(bit; R/W) – set ON to enable a capture (requires Capture signal inputconfiguration) • .CountCaptured(bit; RO) – indicates a counthas been captured (requires Capture signalinput configuration) • .CapturedValue(signed double-word; RO) – captured count value (requiresCapture signal input configuration)

8. High-Speed Inputs (Up Counter) • Up Counter ($HsCtrTmr1, 2 & 3) other features: • Reset Input – hardware reset signal • Inhibit Input – hardware inhibit signal • Position scaling – scales Min/Max raw counts to desired engineering Min/Max units • .ScaledValue(real; RO) – contains scaled engineering units as configured

9. High-Speed Inputs (Up Counter) • Up Counter ($HsCtrTmr1, 2 & 3) other features: • Rate scaling – scales raw counts/time base to get a rate • Unit Defintion • Raw Counts/Unit – how many counts per unit • Unit Time Base – how many units per time base • Scale Offset – added to the calculated value • Calc Options • Calc Interval – how often to calculate the value (i.e. how many counts were there in this time?) • Data Filter – number of seconds over which the calculated scaled values will be averaged (smoothing effect)

10. High-Speed Inputs (Up Counter) • Up Counter ($HsCtrTmr1, 2 & 3) Rate structure members: • .ScaledValue(real; RO) – contains scaled engineering units as configured • .FilterTimeConst(real; R/W) – how often (in seconds) the rate scale is calculated

11. High-Speed Inputs (Up Counter) • Rate Scaling Example • Let’s say we are calculating RPM & we know if we receive 800 counts in 1 minute that is 1 RPM • Let’s say we received 2 counts in 100ms: • P = 0.1/2 = 0.05 R: Rate U: “Unit Time Base” (in sec) P: (time of sample)/(counts in sample) C: “Raw Counts/Unit” S: “Scale Offset”

12. High-Speed Inputs (Down Counter) • Down Counter – decrements on edge • Exactly like the Up Counter

13. High-Speed Inputs (Quad Counter) • Quad Counter – increments/decrements according to A/B signals • 1X, 2X or 4X • Requires 2 onboard inputs • Regular-speed inputs can be used here but most counting would require high-speed inputs

14. High-Speed Inputs (Quad Counter) • Quad Counter ($HsCtrTmr1, 2 & 3) Structure members: • Same as Up & Down Counter with the addition of: • .QuadError(bit; RO) – indicates both A & B inputs came on at the same time • Inputs are not actual quadrature signals • Frequency of A & B signals is too fast

15. High-Speed Inputs (Quad Counter) • Quad Counter other features: • Same as Up & Down Counters with the addition of: • Rotary Mode – pulses coming from a rotary source that wrap back to a count of 0 at a certain value (specify the total number of counts in the rotary range) • E.g. Rotary Count of 3600 yields count values from 0 to 3599

16. High-Speed Inputs (Quad Counter) • Quad Counter Position & Rate Scaling: • Position & Rate scaling – exactly same as Up & Down Counter

17. High-Speed Inputs (Bidirectional Counter) • Bidirectional Counter – increments/decrements count based on pulses on Count Input according to state of Direction Input • All other functions are exactly the same as Quad Counter

18. High-Speed Inputs (Up/Down Counter) • Up/Down Counter – increments count for pulses on Count Up Input and decrements count for pulses on Count Down Input • All other functions are exactly the same as Quad Counter

19. High-Speed Inputs (Edge Timer) • Default Device Name: @HsCtrTmr1, 2& 3 • Default Structure:$HsCtrTmr1, 2 & 3 • Edge Timer – measures time (µsec) between edges • Rising-rising, rising-falling, falling-rising, falling-falling • Requires 1 onboard input • Regular-speed inputs can be used here but most counting would require high-speed inputs

20. High-Speed Inputs (Edge Timer) • Edge Timer ($HsCtrTmr1, 2 & 3) Structure members: • .Acc(signed double-word; RO) – current time value (µsec) • .LastTime(signed double-word; RO) – last measured time (µsec) • .TimerStarted(bit; RO) – indicates .Accis timing (i.e. 1st edge seen) • .TimerComplete(bit; RO) – indicates .Acc has new time in it (i.e. 2nd edge seen) • .Timeout (bit; RO) – indicates Timeout time has past (requires Enable Timeout & Timeout value to be configured) • .EnableTimer(bit; R/W) – if Free Run is not enabled, this bit must be set ON for the Edge Timer to begin looking for 1st edge • .ScaledValue(real; RO) – only relevant if scaling is configured (next slides) • .FilterTimeConst(real; R/W) – how often (in seconds) the interval scale is calculated (next slides)

21. High-Speed Inputs (Edge Timer) • Edge Timer other features: • Interval scaling – converts µsec time values to units per time period (e.g. calculating RPM from the time between gear teeth on a rotating shaft) • Unit Defintion • Timed Intervals/Unit – ratio of timed edges to desired unit (e.g. 20 gear teeth = 1 revolution; thus 20) • Unit Time Base – how many units per time base (e.g. for 1 revolution per minute, RPM, choose “units per minute”) • Calc Options • Data Filter – number of seconds over which the calculated scaled values will be averaged (smoothing effect)

22. High-Speed Inputs (Edge Timer) • Rate Scaling Example • Let’s say we are calculating RPM & there are 20 teeth on our gear, thus: • Timed Interval/Unit = 20 teeth (edge times)/RPM • Unit Time Base = “units per minute” (1 RPM per minute) • Let’s say we received an Edge Time of 151,555 µsecs (time between teeth): S: Scaled unit U: “Unit Time Base” (in sec) T: “Timed Intervals/Unit” E: Edge Time measured (in sec) O: “Scale Offset”

23. High-Speed Inputs (Dual-Edge Timer) • Dual-Edge Timer – measures time (µsec) between edges of 2 different pulses • Requires 2 onboard inputs • Regular-speed inputs can be used here but most counting would require high-speed inputs • Otherwise identical to Edge Timer