Skip to Content

Wiki source code of 3.2 Inputs and outputs

Version 12.2 by Admin on 2025/02/11 13:02
Hide last authors
Admin 3.2 1 (% data-numbered-headings-start="3" style="--numbered-headings-start: 2;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
Admin 4.1 2 = Configuration =
Admin 1.1 3
Admin 3.2 4 (% data-numbered-headings-start="2" style="--numbered-headings-start: 1;font-size: 0px;color: rgba(0, 0, 0, 0.0);margin-bottom: 0px; margin-top: 0px;" %)
5 == Inputs and outputs ==
Admin 3.1 6
7 === ​​​​​​Discrete inputs ===
8
Admin 1.1 9 The BMS Main 3 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:
14
Admin 6.3 15 [[image:1735053944168-184.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="236" width="800"]]
Admin 1.1 16
Admin 12.2 17 A list of available discrete input assignments is available in
Admin 1.1 18
19 Inversion flags for discrete inputs are configured in the "Signals → Input discrete signals → Inversion" section:
20
Admin 6.3 21 [[image:1735054242278-319.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="207" width="800"]]
Admin 1.1 22
23 The behavior of “KEYRUN” signal can be configured in the "Signals → Input discrete signals → KEYRUN mode" section:
24
25 [[image:1733320685772-445.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="112" width="800"]]
26
27 The behavior of “CHARGE_ON” signal can be configured in the "Signals → Input discrete signals → CHARGE_ON mode" section:
28
29 [[image:1733320685772-786.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="111" width="800"]]
30
31 In both “KEYRUN mode” and “CHARGE_ON mode“ sections:
32
33 * Do nothing – power on device and do nothing;
34 * Set “Discharge request” – power on device and set “Discharge request” signal immediately;
35 * Set “Charge request” – power on device and set “Charge request” signal immediately.
36
Admin 3.1 37 === Current sensor ===
Admin 1.1 38
39 The BMS Main 3 device has an ability to measure battery current by 3 external Hall-Effect current sensors.
40
41 Current sensor settings are configured in the "Signals → Current sensor" section:
42
Admin 7.2 43 [[image:1735054422436-925.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="391" width="800"]]
Admin 1.1 44
45 The device supports the following current sensor settings:
46
47 * Connection – type of multiple sensors connection
48 ** One sensor (#1) – only first sensor is used to measure the battery current;
49 ** Two sensors (#1 and #2) in parallel – sensors are connected in parallel (the total battery current equals the sum of two sensors);
50 ** Two sensors (#1 and #2) in different branches – sensors located in two halves of the battery (used in batteries with a middle point);
51 * Sensor 2, 3: Enable – a flag to enable the second of third current sensor;
52 * Sensor 1, 2, 3: Nominal current – rated current I,,nom,, of the sensor according to the datasheet, А;
53 * Sensor 1, 2, 3: Sensitivity – sensitivity of the current sensor according to the datasheet, V / I,,nom.,,;
54 * Sensor 1, 2, 3: Invert – invert the sign of the measured value;
55 * Sensor 1, 2, 3: Multiply charging current (experimental) – an experimental flag for scaling the charging current by given multiplier;
56 * Sensor 1, 2, 3: Multiplier for charging current – charging current multiplier;
57 * Sensor 1, 2, 3: REF_IN2 mode – mode of additional analog line:
58 ** Not connected;
59 ** Reference line – reference output of the sensor;
60 ** Low range (for the dual range sensor) - a second output of a dual-range sensor (for example, LEM DHAB series);
61 * 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, А;
62 * Sensor 1, 2, 3: Low range sensitivity – sensitivity of the low current line of dual range sensor according to the datasheet, V / I,,nominal.,,;
63 * 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;
64 * Calibrate – a flag to calibrate (find a 0A point) the current sensor when the device is started;
65 * Calibration time – calibration time of the current sensor, millisecond;
66 * Recalibrate current sensor – a command to calibrate the current sensor manually.
67
Admin 3.1 68 === Shunt sensor (CAN bus) ===
Admin 1.1 69
70 The BMS Main 3 device has an ability to measure battery current via a shunt sensor, connected to the CAN bus.
71
72 (% class="box infomessage" %)
73 (((
74 **Note: **The shunt sensor communication protocol can be provided by request.
75 )))
76
77 Shunt sensor settings are configured in the "Signals → Shunt sensor (CAN bus)" section:
78
79 [[image:1733320685776-802.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="108" width="800"]]
80
81 The device supports the following shunt sensor settings:
82
83 * Enable – a flag to start interaction with the BMS Current Sensor (if interaction is enabled, then BMS doesn’t use Hall-Effect current sensor which settings are described in the section "Signals → Current sensor");
84 * Node ID – an address of BMS Current Sensor in the CANopen network;
85 * Invert – a flag to invert current measurements;
86 * Receive timeout – a timeout for receiving messages from the BMS Current Sensor (if no data is being received from the current sensor during this time, the “Shunt offline” flag is set), millisecond;
87 * Mean value threshold – T,,M,, level, A (if module of instantaneous current (I,,I,,) which is received from the shunt sensor is between T,,M,, and T,,0,,, the BMS will use mean value of current I,,M,,; if I,,I,, is greater than T,,M,,, the BMS will use instantaneous value of current I,,I,,);
88 * Zero threshold – T,,0,, level, A (if module of instantaneous current (I,,I,,) which is received from the shunt sensor is lower than T,,0,,, the BMS will assume that current flowing through the battery is zero);
89
Admin 3.1 90 === Temperature sensors ===
Admin 1.1 91
92 Temperature sensors settings are configured in the "Signals → Temperature sensors" section:
93
94 [[image:1733320685777-354.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="97" width="800"]]
95
96 In this section:
97
98 * Type – a type of temperature sensors.
99
Admin 3.1 100 === Output discrete signals ===
Admin 1.1 101
102 The BMS Main 3 device has 4 open drain type outputs. For each discrete output, its assignment and inversion flag are set.
103
104 Assignments of discrete outputs are configured in the "Signals → Output discrete signals → Assignments" section:
105
Admin 8.2 106 [[image:1735054536275-447.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="148" width="800"]]
Admin 1.1 107
108 The device supports the following assignments for discrete outputs:
109
110 * No output – output is not used.
111 * Low SOC – a signal corresponding the low SOC of the battery;
112 * High charging current – charging current is high;
113 * Main contactor – state of the main contactor;
114 * Charging – state of the charging contactor;
115 * Allow charging – a signal for a charger to start charging;
116 * Charging current present – the presence of the charging current;
117 * Precharging – state of the precharging contactor;
118 * Discharging – state of the discharging contactor;
119 * Discharging current present – the presence of the discharging current;
120 * Discharging (AUX) – state of the auxiliary discharging contactor;
121 * Power down ACK – an acknowledgement of BMS power down. Acknowledgement is outputted when the charge and discharge contactors have been opened on power down request;
122 * Charging/discharging - state of the charging/discharging contactor;
123 * Heater – a command to turn on a heater;
124 * Cooler – a command to turn on a cooler;
125 * Balancing 1 – balancing the first series of cells;
126 * Balancing 2 – balancing the second series of cells;
127 * Ready to charge – the battery is ready to be charged;
128 * Ready to discharge – the battery is ready to be discharged;
Admin 8.2 129 * Power up – an indication of BMS power status;
130 * General error – state of the configurable (general) error;
Admin 9.2 131 * External 1 – a signal that activates by the remote request.
Admin 1.1 132
133 Inversion flags for discrete outputs are configured in the "Signals → Output discrete signals → Inversion" section:
134
Admin 9.2 135 [[image:1735054654975-772.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="124" width="800"]]
Admin 1.1 136
Admin 3.1 137 === Power switches ===
Admin 1.1 138
139 The BMS Main 3 device has 6 power switches to drive contactors. For each switch, its assignment and inversion flag are set.
140
141 Assignments of power switches are configured in the "Signals → Power switches → Assignments" section:
142
Admin 11.2 143 [[image:1735054694689-808.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="167" width="800"]]
Admin 1.1 144
Admin 11.2 145 The device supports the same switch assignments as discrete outputs (see [[Output discrete signals>>doc:||anchor="HOutputdiscretesignals"]]).
Admin 1.1 146
147 Inversion flags for switches are configured in the “Signals → Power switches → Inversion” section:
148
Admin 12.1 149 [[image:1735054793459-953.png||data-xwiki-image-style-alignment="center" data-xwiki-image-style-border="true" height="149" width="800"]]
Admin 2.1 150
151