Serial Communication Programmer Reference Guide
Powermax65/85/105 SYNC Reference Guide 810400 19
Programming recommendations
For the best results, use the programming examples that start on page 20 and the
flowcharts in Flowchart Examples on page 61. These recommendations give you faster
and more reliable communication.
Let the Powermax65/85/105 SYNC select the operating settings. Hypertherm
recommends that you let the Powermax65/85/105 SYNC set the operating mode, output
current (A), and gas pressure automatically for the installed cartridge.
Program the CNC to either automatically identify, or prompt the operator to identify,
the plasma power supply type (SYNC or older plasma power supply). Then use the
appropriate register addresses (0x3xxx or 0x2xxx). This lets you reuse the programming on
all of your CNCs and cutting tables.
Use Modbus function code 04 (Read Input Registers) for Holding Registers and Input
Registers. It is not necessary to use Modbus function code 03 (Read Holding Registers) for
holding registers. Hypertherm supports this usage to simplify Modbus programming.
Send a single request for multiple registers at one time, when possible, for faster and
more reliable communication.
Do a check for faults every 1 second. This is equivalent to doing a check that the plasma
power supply is prepared for operation.
Do all the recommended steps for all fault codes that occur, including notifications
that do not stop the cutting process. Troubleshooting all faults helps you to get optimal
cut quality and consumable life.
Program the CNC to log every active fault, including the date and time, to aid in
troubleshooting.
Program a response time-out of 60 ms – 100 ms, to give sufficient time for
communication to occur.
Program a delay of 50 ms between Start signals, to give sufficient time for the relay
circuits to complete switching.
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