Index: firmware/App/Services/FPGA.c
===================================================================
diff -u -r79e9be79f488da3a4aef5d755d359fff91a8db3e -r021e6ea5f99fd6da424d8ab81d6a106f2cb41294
--- firmware/App/Services/FPGA.c	(.../FPGA.c)	(revision 79e9be79f488da3a4aef5d755d359fff91a8db3e)
+++ firmware/App/Services/FPGA.c	(.../FPGA.c)	(revision 021e6ea5f99fd6da424d8ab81d6a106f2cb41294)
@@ -156,8 +156,8 @@
     U08 fpgaReserved1;                      ///< Reg 375. Reserved
 
     U16 fpgaValveStates;                    ///< Reg 376. Valves states
-    U16 fpgaFan1Pulse;                      ///< Reg 378. Fan 1 pulse time in 2.5 us solution
-    U16 fpgaFan2Pulse;                      ///< Reg 380. Fan 2 pulse time in 2.5 us solution
+    U16 fpgaFanIn1Pulse;                    ///< Reg 378. Fan inlet 1 pulse time in 2.5 us resolution
+    U16 fpgaFanOut1Pulse;                   ///< Reg 380. Fan outlet 1 pulse time in 2.5 us resolution
 
     U08 fpgaEmstatOutByte;                  ///< Reg 382. Emstat output FIFO - data from the Emstat device
     U08 fpgaEmstatRxErrorCount;             ///< Reg 383. Number of receive errors since power-up
@@ -169,6 +169,12 @@
     U08 fpgaGPIOReg;                        ///< Reg 392. FGPA GPIO register
     U08 fpgaDummyByte2Addr;                 ///< Reg 393. Dummy byte address to maintain an even addressing scheme
     U16 fpgaADCTemp;                        ///< Reg 394. Internal FPGA die temperature ADC
+
+    U16 fpgaFanIn2Pulse;                    ///< Reg 396. Fan inlet 2 pulse time in 2.5 resolution
+    U16 fpgaFanOut2Pulse;                   ///< Reg 398. Fan outlet 2 pulse time in 2.5 resolution
+    U16 fpgaFanIn3Pulse;                    ///< Reg 400. Fan inlet 3 pulse time in 2.5 resolution
+    U16 fpgaFanOut3Pulse;                   ///< Reg 402. Fan outlet 3 pulse time in 2.5 resolution
+
 } DG_FPGA_SENSORS_T;
 
 typedef struct
@@ -1594,7 +1600,7 @@
  *************************************************************************/
 U16 getFPGAInletFan1TogglePeriod( void )
 {
-    return fpgaSensorReadings.fpgaFan1Pulse;
+    return fpgaSensorReadings.fpgaFanIn1Pulse;
 }
 
 /*********************************************************************//**
@@ -1606,7 +1612,7 @@
  *************************************************************************/
 U16 getFPGAInletFan2TogglePeriod( void )
 {
-    return fpgaSensorReadings.fpgaFan2Pulse;
+    return fpgaSensorReadings.fpgaFanIn2Pulse;
 }
 
 /*********************************************************************//**
@@ -1618,7 +1624,7 @@
  *************************************************************************/
 U16 getFPGAInletFan3TogglePeriod( void )
 {
-    return 0;
+    return fpgaSensorReadings.fpgaFanIn3Pulse;
 }
 
 /*********************************************************************//**
@@ -1630,7 +1636,7 @@
  *************************************************************************/
 U16 getFPGAOutletFan1TogglePeriod( void )
 {
-    return 0;
+    return fpgaSensorReadings.fpgaFanOut1Pulse;
 }
 
 /*********************************************************************//**
@@ -1642,7 +1648,7 @@
  *************************************************************************/
 U16 getFPGAOutletFan2TogglePeriod( void )
 {
-    return 0;
+    return fpgaSensorReadings.fpgaFanOut2Pulse;
 }
 
 /*********************************************************************//**
@@ -1654,7 +1660,7 @@
  *************************************************************************/
 U16 getFPGAOutletFan3TogglePeriod( void )
 {
-    return 0;
+    return fpgaSensorReadings.fpgaFanOut3Pulse;
 }
 
 /*********************************************************************//**