At 210 the heater just stops going up. It remains stable at that temperature. And the correct temperatures can be controlled manually through console or web without issue.
I have tracked it to the software. I finally tried a completely new program. The g-code it outputs results in the correct set temperature being reached.
I found that and the broken g-code just before I checked back here. I don't know why the software is suddenly malfunctioning. But apparently it is. The temp is set at 210. So the hardware is responding correctly and it's apparently not a configuration setting like I was afraid it was going to be.
;Generated with Cura_SteamEngine 15.01
; Default start code
G28 ; Home extruder
G1 Z15 F100
M107 ; Turn off fan
G90 ; Absolute positioning
M82 ; Extruder in absolute mode
M190 S50
; Activate all used extruder
M104 T0 S210
G92 E0 ; Reset extruder position
; Wait for all used extruders to reach temperature
M109 T0 S210
;Layer count: 298