Controlling a BTS7960 Driver/H-Bridge

JRCL

Struggling to control this BTS7960 DC Motor Driver. Hoping someone can help me figure out what I have done wrong. This is just a test bench for a full machine and I know the Duex will have to be used so just trying to match those conditions.

I've switched the Duex V_FAN jumper to 5V AUX. Here is my wiring diagram (Duet-Duex ribbon connector not shown):

My Config.G

; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"RL1 V3"                        ; set printer name

; Network
M552 S1                                        ; enable network
M586 P0 S1                                     ; enable HTTP
M586 P1 S0                                     ; disable FTP
M586 P2 S0                                     ; disable Telnet

;Relay Control
M950 P1 C"!duex.gp1"			;declare port 1 to GPIO Pin 1; R_PWM
M950 P2 C"!duex.gp2"			;declare port 2 to GPIO Pin 2; L_PWM		
M950 P3 C"!duex.fan6" 			;declare port 3 to fan 6; R_EN & L_EN

Macro I'm using to test it

M42 P3 S255	 ;set L_EN & R_EN to PWM of 255=HIGH		
M42 P1 S1.0	;Set R_PWM to HIGH	
M42 P2 S0 	;Set L_PWM to LOW

o_lampe

@JRCL said in Controlling a BTS7960 Driver/H-Bridge:

M42 P1 S1 ;Set R_PWM to HIGH
M42 P2 S0 ;Set L_PWM to LOW

I always wondered how RRF knows when I set P1 S1, that it means 100% PWM and not 1/256 dutycycle fractions?
Isn't it mandatory to use P1 S1.0 to make it clear?

JRCL

@o_lampe I gave that a try, unfortunately, no improvements