Wiki source code of 3.2 Inputs and outputs

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2 = Configuration =
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5 == Inputs and outputs ==
6
7 === Discrete inputs ===
8
9 The BMS Main 3X device has **6 discrete inputs** that detect signal line closing to the virtual ground, and **2 inputs** that detect 9-32V input voltage. For each discrete input, its assignment and inversion flag are set.
10
11 Also, BMS has two additional configurable inputs named “KEYRUN” and “CHARGE_ON”, each serves 9-32V input voltage. Those inputs serve as power buttons with additional functions that can be set.
12
13 Assignments of discrete inputs are configured in the "Signals → Input discrete signals → Assignments" section:
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15 [[image:1734022225578-818.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="153" width="600"]]
16
17 The device supports the following assignments for discrete inputs:
18
19 * No input – input is not used;
20 * Battery cover – a signal from the battery cover;
21 * Charge request – a request to close the charging contactor;
22 * Precharge request – a request to close the precharging contactor;
23 * Discharge request – a request to close the discharging contactor;
24 * Charging contactor feedback – a signal from charging contactor feedback loop;
25 * Discharging contactor feedback – a signal from discharging contactor feedback loop;
26 * Charging/Discharging contactor feedback – a signal from charging/discharging contactor feedback loop;
27 * Insulation status – a signal from an insulation monitoring device;
28 * Join to charge – a request to join (connect in parallel) battery modules to charge the battery;
29 * Join to discharge – a request to join (connect in parallel) battery modules to discharge the battery;
30 * Precharge contactor feedback – a signal from precharging contactor feedback loop;
31 * Main contactor feedback – a signal from main contactor feedback loop;
32 * Interlock – a signal from interlock loop;
33 * Power down request – a request to power down the BMS.
34
35 Inversion flags for discrete inputs are configured in the "Signals → Input discrete signals → Inversion" section:
36
37 [[image:1734022225583-740.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="600"]]
38
39 The behavior of “KEYRUN” signal can be configured in the "Signals → Input discrete signals → KEYRUN mode" section:
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41 [[image:1734022225584-474.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="87" width="600"]]
42
43 The behavior of “CHARGE_ON” signal can be configured in the "Signals → Input discrete signals → CHARGE_ON mode" section:
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45 [[image:1734022225585-775.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="89" width="600"]]
46
47 In both “KEYRUN mode” and “CHARGE_ON mode” sections:
48
49 * Do nothing – power on device and do nothing;
50 * Set “Join to discharge” – power on device and set “Join to discharge” signal immediately;
51 * Set “Join to charge” – power on device and set “Join to charge” signal immediately;
52 * Set “Discharge request” – power on device and set “Discharge request” signal immediately;
53 * Set “Charge request” – power on device and set “Charge request” signal immediately.
54
55 === Current sensor ===
56
57 The BMS Main 3X device has an ability to measure battery current by **3 external Hall-Effect current sensors**.
58
59 Current sensor settings are configured in the "Signals → Current sensor" section:
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61 [[image:1734022225586-287.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="178" width="600"]]
62
63 The device supports the following current sensor settings:
64
65 * Calculate the battery current as the sum of battery modules currents – a flag that determines overall current as sum of battery modules currents (if flag is not set, device uses measurements from a physical current sensor);
66 * Connection – type of multiple sensors connection
67 ** One sensor (#1) – only first sensor is used to measure the battery current;
68 ** Two sensors (#1 and #2) in parallel – sensors are connected in parallel (the total battery current equals the sum of two sensors);
69 ** Two sensors (#1 and #2) in different branches – sensors located in two halves of the battery (used in batteries with a middle point);
70 * Sensor 2, 3: Enable – a flag to enable the second of third current sensor;
71 * Sensor 1, 2, 3: Nominal current – rated current I,,nom,, of the sensor according to the datasheet, A;
72 * Sensor 1, 2, 3: Sensitivity – sensitivity of the current sensor according to the datasheet, V / I,,nom.,,;
73 * Sensor 1, 2, 3: Invert – invert the sign of the measured value;
74 * Sensor 1, 2, 3: Multiply charging current (experimental) – an experimental flag for scaling the charging current by given multiplier;
75 * Sensor 1, 2, 3: Multiplier for charging current – charging current multiplier;
76 * Sensor 1, 2, 3: REF_IN2 mode – mode of additional analog line:
77 ** Not connected;
78 ** Reference line – reference output of the sensor;
79 ** Low range (for the dual range sensor) - a second output of a dual-range sensor (for example, LEM DHAB series);
80 * Sensor 1, 2, 3: Low range nominal current - rated current I,,nom,, of the low current line of dual range sensor according to the datasheet, A;
81 * Sensor 1, 2, 3: Low range sensitivity – sensitivity of the low current line of dual range sensor according to the datasheet, V / I,,nominal.,,;
82 * Sensor 1, 2, 3: Threshold for low range – a threshold current value at which the device uses the readings of the high current sensor instead of low current, A;
83 * Calibrate – a flag to calibrate (find a 0A point) the current sensor when the device is started;
84 * Calibration time – calibration time of the current sensor, millisecond;
85 * Recalibrate current sensor – a command to calibrate the current sensor manually.
86
87 === Temperature sensors ===
88
89 Temperature sensors settings are configured in the "Signals → Temperature sensors" section:
90
91 [[image:1734022225587-758.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="58" width="600"]]
92
93 In this section:
94
95 * Type – a type of temperature sensors.
96
97 === Output discrete signals ===
98
99 The BMS Main 3X device has **4 open drain outputs**. For each discrete output, its assignment and inversion flag are set.
100
101 Assignments of discrete outputs are configured in the "Signals → Output discrete signals → Assignments" section:
102
103 [[image:1734022225588-223.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="131" width="600"]]
104
105 The device supports the following assignments for discrete outputs:
106
107 * No output – output is not used.
108 * Charging – state of the charging contactor;
109 * Discharging – state of the discharging contactor;
110 * Charging/Discharging - state of the charging/discharging contactor;
111 * Precharging – state of the precharging contactor;
112 * Heater – a command to turn on a heater;
113 * Cooler – a command to turn on a cooler;
114 * Main contactor – state of the main contactor;
115 * Critical error – a signal indicating there is a Critical error on BMS Main 3X;
116 * General error (modules) – a signal indicating there is a General error on one of the modules;
117
118 Inversion flags for discrete outputs are configured in the "Signals → Output discrete signals → Inversion" section:
119
120 [[image:1734022225589-659.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="118" width="600"]]
121
122
123 === Power switches ===
124
125 The BMS Main 3X device has **6 power switches to drive contactors**. For each switch, its assignment and inversion flag are set.
126
127 Assignments of power switches are configured in the "Signals → Power switches → Assignments" section:
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129 [[image:1734022225590-811.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="145" width="600"]]
130
131 The device supports the same switch assignments as discrete outputs.
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133 Inversion flags for switches are configured in the “Signals → Power switches → Inversion” section:
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135 [[image:1734022225591-262.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="137" width="600"]]
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