SECM70

SECM70-15XX

Product Summary

The SECM70 control platform fits a variety of applications, including gasoline and natural gas engines for power generation, forklifts, lift trucks, and on-highway vehicles. The SECM70 control is programmed to meet the specific needs of the prime mover and its driven load.

At the heart of the SECM70 control is a powerful 32-bit ST SPC563M64 microprocessor that runs Woodward’s ControlCore operating system. Application programming is accomplished via Woodward’s MotoHawk application software tool. MotoHawk is a rapid controls system development tool that allows controls engineers to quickly create controls software directly within Simulink diagrams, which run on any MotoHawk-enabled electronic control modules. Application developers work directly in the Simulink environment and with a one-step build are able to go from an application model to a file that can be programmed directly into Woodward production hardware. MotoHawk provides a high-level programming environment for users who have control systems expertise but don’t necessarily have specific embedded programming skills. Once the application program has been generated and loaded into the SECM70 control via the CAN port, the user can view variables and tune the control using an appropriate service interface tool such as Woodward's Toolkit or MotoTune. Connection to other devices, such as a diagnostic tool, is accomplished by means of other CAN ports available on the control. The desired information flow is programmed into the control via MotoTune or ToolKit.
The SECM70 control consists of a single rigid printed circuit board attached to an aluminum housing using thermal adhesive, which is then closed and sealed with an aluminum cover. Connections to the control are made via a single 70-pin automotive-style sealed connector. The control can be mounted directly to the engine or frame using vibration isolators which are available pre-installed on the control or separately.

Hardware Features

70-Pin platform

Microprocessor: ST SPC563M64, 80 MHz

Memory: 1.5 M flash, 94 K RAM, 16 K serial EEPROM

Operating Voltage: 8–32 Vdc, 36 V (jump start), 5.5 V (crank)

Operating Temperature: –40 to +105 °C

Inputs

VR or digital crank position sensor

Digital cam position sensor

Up to 14 analogs

Up to 5 digital (4 switch, 1 speed)

up to 2 switch-type oxygen sensors

Optional wide-range oxygen sensor

Up to 2 knock sensors

Outputs

6 high-impedance injector drivers (up to 4 low impedance injector drivers)

Up to 8 electronic spark-triggers for smart injection coils

9 low-side drivers

3 lamp drivers

1 main power relay driver

up to 2 H-bridge drivers

Optional 3-phase brushless DC motor driver

1 sensor supply (5V)

Communications

2 CAN 2.0b channels

Datasheets

Datasheet

MY14 Hardware Manual

MY15 Hardware Manual

More information on the Woodward Wiki

Part Numbers

Part Num x=Inactive	Part w/ MTG HW	HW Version	Features
1751-6680	8923-2050	1452 (PROD)	Mobile Industrial
1751-6649 x	8923-2051	1402 (DEV)	Mobile Industrial, on-the-fly calibratible
1751-6681	8923-2052	1453 (PROD)	Power Generation
1751-6650 x	8923-2053	1403 (DEV)	Power Generation, on-the-fly calibratible
1751-6682	8923-2002	1459 (PROD)	Marine
1751-6721	8923-2255	1559 (PROD)	Marine (MY15 revision, use the 1459 target)
1751-6653 x	8923-1987	1409 (DEV)	Marine, on-the-fly calibratible
1751-6715	8923-2260	1509 (DEV)	Marine, on-the-fly calibratible (MY15 revision, use the 1409 target)
1751-6719	8923-2253	1562 (PROD)	Mobile Industrial
1751-6713	8923-2258	1512 (DEV)	Mobile Industrial, on-the-fly calibratible
1751-6720	8923-2254	1563 (PROD)	Power Generation
1751-6714	8923-2259	1513 (DEV)	Power Generation, on-the-fly calibratible
1751-6750	N/A	1603 (DEV)	Power Generation, on-the-fly calibratible using MPC5642A
1751-6722	8923-2256	1565 (PROD)	On-Highway
1751-6716	8923-2261	1515 (DEV)	On-Highway, on-the-fly calibratible
1751-6723	8923-2257	1566 (PROD)	Hydraulic
1751-6717	8923-2262	1516 (DEV)	Hydraulic, on-the-fly calibratible

Related Part Numbers

Part Number	Description
8923-1761	Connector Kit
1635-1772	Connector Only
8996-2162 8996-2163 8996-2164	Crimp Tools
8996-2167	Removal Tools
1635-1800	Boot Key
5404-1141	Pig Tail
5404-1364	Development Harness
5404-1341	Desktop Simulator Harness

Model Variant Features

Function	MI-1402/1452	MI-1512/1562	PG-1403/1453	PG-1513/1563	SK-1409/1459	SK-1509/1559	OH-1515/1565	LV-1516/1566
	1751-6649/6680	1751-6713/6719	1751-6650/6681	1751-6714/6720	1751-6653/6682	1751-6715/6721	1751-6716/6722	1751-6717/6723
	PIN #
AN1 (221k_PD)	28	28	28	28	28	28	28	28
AN2 (221k_PD)	24	24	24	24	24	24	24	24
AN3 (221k_PD)	22	22	22	22	22	22	22	22
AN4 (221k_PD)	42	42	42	42	42 (2.21k_PU)	42 (2.21k_PU)	42	42
AN5 (4.75k_PD)	43	43	43	43	43 (2.21k_PU)	43 (2.21k_PU)	43	43 (221k_PD)
AN6 (4.75k_PD)	47	47	-	-	47 (2.21k_PU)	47 (2.21k_PU)	-	47 (221k_PD)
AN7 (51.1k_PD)	44	44	44	44	44 (1ms T )	44 (1ms T )	44	47 (221k_PD)
AN8 (4.75k_PD)	45	45	45	45	45 (51.1k_PD)	45 (51.1k_PD)	45	45 (221k_PD)
AN9 (2.21k_PU)	39	39	39	39	39 (1k_PU)	39	39	39
AN10 (2.21k_PU)	40	40	40	40	40 (1k_PU)	40	40	40
AN11 (2.21k_PU)	41	41	41	41	41 (1k_PU)	41	41	41
AN12 (4.75k_PU)	59	59	59	59	59 (1k_PU)	59 (221k_PD)	59	59 (51.1k_PU)
AN13 (4.75k_PU)	60	60	60	60	60 (2.21k_PU)	60 (221k_PD)	60	60 (51.1k_PU)
AN14 (10k_PU)	61	61	61	61	-	-	61	-
AN16 (51.1k_PD)	-	-	-	-	46	46	-	62 (221k_PD)
AN17	-	-	-	-	-	-	-	-
AN18	-	-	-	-	-	-	-	64
AN19	-	-	-	-	-	-	-	63
EGO1	65/66	65/66	65/66	65/66	-	-	65/66	65/66
EGO2	49/50	49/50	-	-	-	-	-	49/50
UEGO	-	-	47(SNS), 50(SR), 3(HTR), 49(TG), 33(INRC)	47(SNS), 50(SR), 3(HTR), 49(TG), 33(INRC) (Improved accuracy)	-	-	47(SNS), 50(SR), 3(HTR), 49(TG), 33(INRC) (Improved accuracy)	-
EK1	63/64	63/64	63/64	63/64	63/64	63/64	63/64	-
EK2	62/46	62/46	62/46	62/46	-	-	62/46	-
SWG1	25	25	25	25	25	25	25	25
SWG2	27	27	27	27	27	27	27	27
SWG3	29	29	29	29	29	29	29	29
SWG4 / BOOT	26	26	26	26	26	26	26	26
CAM_DG	30	30	30	30	30	30	30	30
CNK_DG	31	31	31	31	31	31	31	31
SPD	33	33	-	-	-	-	-	33
CNK_VR/SPD_VR	16/17	16/17	16/17	16/17	16/17	16/17	16/17	16/17
LSO1	7	7	7	7	7	7	7	7
LSO2	3	3	3	3	3	3	3	3
LSO3 (CS)	4	4	4	4	4	4	4	4
LSO4	5	5 (Inductive capable)	5	5 (Inductive capable)	5	5	5 (Inductive capable)	5
LSO5	9	9 (Inductive capable)	9	9 (Inductive capable)	9	9	9 (Inductive capable)	9
LSO6 (CS)	10 (no CS)	10 (no CS) (Inductive capable)	10 (no CS)	10 (no CS) (Inductive capable)	11 (10 no CS)	11 (10 no CS)	10 (no CS) (Inductive capable)	11 (166mA/Volt)
LSO7 (CS)	15 (no CS)	15 (no CS)	15 (no CS)	15 (no CS)	15	15	15 (no CS)	15 (166mA/Volt)
LSO8	20	20	20	20	20	20	20	20
LSO9	23	23	23	23	23	23	23	23
MPRD	55	55	55	55	55	55	55	55
LAMP1	58	58 (Improved diag)	58	58 (Improved diag)	-	-	58 (Improved diag)	58
LAMP2	57	57 (Improved diag)	57	57 (Improved diag)	-	-	57 (Improved diag)	57
LAMP3	56	56 (Improved diag)	56	56 (Improved diag)	-	-	56 (Improved diag)	56
INJ1 (PH)	34	34	-	-	-	-	34	34
INJ2 (PH)	35	35	-	-	-	-	35	35
INJ3 (PH)	1	1	-	-	-	-	1	1
INJ4 (PH)	-	-	-	-	-	-	18	-
INJ4	12	12	-	-	12	12	-	12
INJ5	13	13	-	-	13	13	-	-
INJ6	14	14	-	-	14	14	-	-
H1	51/52	51/52	51/52	51/52	-	-	51/52	51/52
H2	-	-	34/35	34/35	-	-	-	-
3-Phase	-	-	-	-	51/34/52	51/34/52	-	-
EST1	6	6	6	6	-	-	6	6
EST2	8	8	8	8	-	-	8	8
EST3	11	11	11	11	-	-	11	-
EST4	21	21	21	21	21	21	21	21
EST5	18	18	18	18	18	18	13	18
EST6	19	19	19	19	19	19	14	19
EST7	-	-	13	13	-	-	-	13
EST8	-	-	14	14	-	-	-	14
MotorPhaseVSense_A	-	-	-	-	58	58	-	-
MotorPhaseVSense_B	-	-	-	-	57	57	-	-
MotorPhaseVSense_C	-	-	-	-	56	56	-	-

Software Variant Features

15xx Modules

• Available since MotoHawk 2015a SP0 or newer
• Improved diagnostic on LAMP pins
• Increased UEGO resolution and accuracy
• Increased switching speed on LSO4/5/6/7 and H2
• Allow LSO4/5/6 to drive inductive loads
• Modules that support UEGO expose an additional internal ADC resource for FVOUT. This provides the user an option to use a slightly higher resolution reading.
• Hardboot firmware version 2.08
• The factory installed application supports XCP communications and reflashing using CAN_2 at 500k with CRO = 0x188C0CF9 and DTO = 0x188BF90C
• Reprogramming supported on CAN2

Compiler

Green Hills version 4.2.4
GCC for PowerPC EABI-SPE version 4.6.0

BootKey

A malfunctioning application previously loaded on the SECM70 can be recovered using the BootKey recovery.
The BootKey signal needs to be connected to the SWG4 pin.

Bootstrap

The SECM70 can be forced to remain in the firmware bootloader by applying a bootstrap sequence. The bootstrap sequence is:

Pin	State for Boot
AN1	High
AN2	High
AN3	High
AN4
AN5
AN6
AN7
AN8
AN9	Low
AN10	Low
AN11	Low

Frequently Asked Questions/Topics

All Variants

Can I diagnose PWM EST outputs?

Due to the nature of the hardware, EST diagnostics are only available when driven as a sequence and not as a PWM.

The ESTs have a caveat that certain groups must not turn off at the same time as there is shared diagnostic HW.

The groupings where you should avoid turning off at the same time are:
EST 1,2
EST 3,4
EST 5,6,7,8

Why is LSO6 current sense not working?

On modules that support current sense for the resource LSO6, the load must be connected to pin 11. Pin 10 is also connected to the LSO6 driver but before the current measurement sense resistor and therefore current will not be measured.

How would you use the H1GATE_ENABLE output?

The H1GATE_ENABLE can be used to reset the ASIC responsible for driving H1 the SECM70. If H1GATE_ENABLE is not referenced in the application, then by default it will always be set in an enabled state. If a reset of the ASIC is necessary, it is suggested to set H1GATE_ENABLE to false (logic 0) for one RTI period and then return H1GATE_ENABLE to true (logic 1).

Why do I see a high current on H1 when in Fault or H1GATE_ENABLE is disabled?

Current measurement is obtained by sampling analog outputs from the ASIC. These outputs are centered at 2.5V such that +ve and -ve currents can be reported. However when in fault or disabled, the analog output channel goes to 0V and therefore is reported to have Max current.

Specific Variants

Marine Specific

Is the Marine variant suited for sensorless 3-phase brushless motor?

To introduce this answer, we review that it is possible to run a 3-phase brushless DC motor with and without position sensors. A position sensor can directly indicate the position of a motor shaft. Sensorless systems are advanced enough to determine the position of the shaft through back-EMF waveforms, although complexity will increase greatly under very small signal to noise ratios (when the motor is just starting and at very slow speeds.)

Engineers have design protected for sensorless 3-phase brushless DC motor operation in SECM70, but the Marine variant is not suited for this application.

The Marine variant SECM70 should always be designed to operate a 3-phase brushless motor with hall position sensors connected to module pins 56,57,58 for PhaseC, PhaseB, PhaseA, respectively. MotoHawk Input Capture blocks can then be used with the resources MotorPhaseVSense_A, MotorPhaseVSense_B, and MotorPhaseVSense_C. The Input Capture behavior allows the application to be notified of an input pin state change, which correlates to a sample every 60 degrees. The algorithm to calculate motor position and speed is outside the scope of what MotoHawk is providing in support of this module.

How is LSO3 different than LSO6/LSO7 on the Marine variant?

LSO3 current sense is only able to measure current when the driver is in the On state. This is common to all the module variants. The Marine variant has additional current sense for LSO6 and LSO7. The current measurement at pins 11 and 15, respectively, will measure the current when the driver state is On and Off.

What is the power capability of the BLDC motor driver on the SECM70? For what type of motor was this designed?

3 phase controls a bi-directional brushless DC motor which may be used for closed-loop fluid pressure control. The motor must operate in both directions at variable speeds.

The circuit shall be capable of driving the motor at its maximum speed:

For 12V systems, no motor load (mechanical) speed is 5800RPM, stall current is 9.4A. For 24V systems, no load (mechanical) speed is 5500RPM, stall current is 7.5A.

For 12V systems, 3 phase shall support 3A continuous typical. The typical phase-phase resistance is 0.92 ohms. For 24V systems, 3 phase shall support 1.3A continuous typical. The typical phase-phase resistance is 3.2 ohms.

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