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DL405 Frequently Asked Questions AutomationDirect Logo


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  • CPU & Programming
  • Power, I/O, and Wiring
  • PID
  • Communications
  • High-speed count / Pulse out
  • Analog
  • Local and Remote I/O
  • Specialty Modules
  • TI405
  • Base Controllers

Click here to view all DL405 FAQs with answers on one page.

  1. How do I reset my processor back to factory defaults?
  2. Why can I not get any Control Output from my PID loop?
  3. Why does my Setpoint Value change in my PID loop when I go from Manual to Auto from the PID view or ladder?
  4. Which DL405 CPUs support Manual Addressing capabilities in local and local expansion bases?
  5. Which protocol do I choose for communication to the RS-232 port of a Slice I/O slave?
  6. Can the DL405 use Modbus protocol?
  7. What is the accuracy of the PLC real-time clock?
  8. Is there a limitation on the number of High Speed Counters you can install with the DL-430 CPU?
  9. What is the torque specification for the terminal blocks on the DL405 modules?
  10. Will the D4-RAM-1, D4-RAM-2, D4-EE-2 or the D4-UV-1 work with the TI-435?
  11. Does the D4-RM have to be at the end of the chain or can it be wired in the chain (i.e., with slaves at each end)?
  12. How often should I change the backup battery?
  13. Does the DL405 series support DNP 3.0 protocol?
  14. How would we check this PLC to make sure that it is calibrated?
  15. How do I do ASCII out with a D4-440?
  16. Can the D4-DCM work in DirectNET ASCII mode in peer-to-peer setup?
  17. Is there an "equal to" command for the D4-430 CPU?
  18. Are the comm port settings and retentive memory settings stored on the memory cartridge?
  19. Can you power up and program a DL405 CPU while disconnected from the backplane?
  20. Does the D4-450 UV prom need the D4-HPP to code?
  21. What is the current rating on a D4-450DC-1 cpu?
  22. Do you offer precision resistors?
  23. What is standard current draw on the D4-450 CPU @110VAC?
  24. Is there a 24vdc-powered EBC for 405 series?
  25. What are the threshold voltages on the D4-HSC?
  26. What is the part # for spare terminal blocks for F4-08TRS-1?
  27. Can you common the CA and CB on the D4-16ND2F module?
  28. Do the DL405 PLCs have Ethernet onboard?
  29. Is there a CPU that can handle a square root?
  30. Will any port on the D4-450 work for firmware upgrade?
  31. Is the TI-435 the same as the D4-440?
  32. Can I run remotes out of sequence, i.e., #1, #3, #6, and #2?
  33. Can an I/O connector be connected to a D4-FILL module so wiring for a future module can be in place?
  34. Will your H4-EBC work with Labview?
  35. I forgot my password, what are my options?
  36. Where can I obtain the most current firmware for my CPU?
  37. Can the D4-430 support K-sequence out of both comm ports at the same time?
  38. Can I use an analog card in a DL 405 remote set up?
  39. I have an older D4-440 CPU, will it work with the H4-ECOM?
  40. Can the DL 405 system be mounted vertical?
  41. On the D4-RSDC, Is the power supply isolated from ground or is it floating?
  42. Do you offer a DL405 slice slave that has AC I/O?
  43. Can I have multiple ECOMS in a DL405 base?
  44. Will TI software work on a D4-440?
  45. Can you set up the High Speed Interface Card in a remote unit?
  46. Can the D4-HSC handle differential counting?
  47. Using the D4-450, do timers self reset if left timing?
  48. Does the D4-450 support autotune?
  49. Q: What is the wire size in the D4-IOCBL-1?
  50. Q: Can a D4-INT fire a subroutine all the time the while the inputs are on?
  51. Q: What is agency approvals on D4-450?
  52. Q: Is a D4-INT manually addressable?
  53. Q: Do we offer a 2 channel analog input for the D4-450?
  54. What purpose does the battery serve in the H4-EBC?
  55. I tried everything to establish communications between my PC and the CPU with no luck. I do have the power LED on and I am powering the processor with 120 VAC. I have confirmed I have the correct communications cable and the latest DirectSOFT32 programming software. What else can I check?
  56. What is the SCCR rating for the DL405 PLCs?
  57. Can I change the backup battery with power applied to my DL405 CPU?
  58. Can the Hx-ECOM use SMTP Authentication in EMail? and help in using ECOM100 Email)
  59. What are the color codes for American/Canadian thermocouples?
  60. How do I use a variable as a timer preset?
  61. I plan on replacing a D4-440 with a D4-450, Does the note on the D4-450 in the web store regarding F4 speciality modules apply to me?
  62. Can I use the memory cartridge from a TI435 in a D4-440
  63. How do I determine if my 405 specialty modules are compatible with with my 450 CPU?
  64. Can I use a D4-RAM cart in a TI-435?
  65. D4-RAM-1 and D4-RAM-2 Battery Info
  66. "I can't see my ECOM(100) with NetEdit. What do I do?"


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