Quick start

Unless stated otherwise, the designation EL3356 also applies to the EL3356-00x0.

For standard commissioning of the EL3356-xxxx with a full strain gauge bridge (strain gauge, load cell, balance beam) proceed as follows:

1. Install the EL3356 in the E-bus terminal strand on an EtherCAT coupler, e.g. EK1100 or EK1501.
2. The EL3356 is fed with the DMS supply voltage from the left via the power contacts. Add an EL95xx power supply terminal before the EL3356 or feed in the supply voltage directly at terminal points 3/7 in the EL3356. An isolating terminal to the previous potential may then need to be inserted.
   The following must be observed:
• Output voltage: 6, 10 or 12 V_DC are usual, depending on the requirements of the DMS
  The EL3356 may be fed with max. 12 V rated supply voltage.
• Load current: each strain gauge has a load current (normally 350 Ω internal resistance). This must not overload the source.
• Supply quality: The most stable and noise-free supply possible must be ensured.
• Apply suitable EMC safety measures (shielding, shield connection, cable laying).
3. Connect the strain gauge in accordance with the instructions. The strain gauge is supplied with 4 or 6 connections.
   In the case of 4-wire connection, bridges must be connected to terminal points 3/6 and 5/7.
   In the case of 6-wire connection, terminal points 1 - 8 can be used directly.
   The shield must be connected. Ensure a conductive connection to the system earth.
4. Set up a correct EtherCAT configuration with the terminal.
   Since the device is present and is electrically reachable, the simplest way of accomplishing this is by scanning the devices.
5. Activate the EtherCAT master and start the terminal in OP state.
   In the input variables the EL3356 must deliver State=8 and WC=0.
6. Parameterize the used DMS in the CoE settings of the EL3356 according to the DMS data sheet.
• Reverse any previous parameter changes by means of a CoE reset: enter 0x64616F6C in object 0x1011:01
• Nominal characteristic value in object 0x8000:23 according to the test protocol of the strain gauge manufacturer, e.g. 2.01 mV/V
• Nominal offset in object 0x8000:25 according to the test protocol of the strain gauge manufacturer, e.g. -0.0154 mV/V
• Nominal load of the strain gauge in object 0x8000:24 according to the test protocol of the strain gauge manufacturer, 5 kg
  Note: the firmware calculates internally without units, the unit used here in "NominalLoad" (as in x8000:28 ReferenceLoad) determines the further calculation
• Change the scaling factor; default output is in [1 Kg] - enter the factor 1000 here to display in [g]
7. EL3356-0010 /-0090: During operation, the terminal can be configured for two dynamic ranges and can be switched quickly during runtime via ControlWord: mode 0 HighPrecision or mode 1 HighSpeed (see chapter Conversion mode). The averager and filter can be preset separately for both modes.
8. The current load can now be read from the process data

What if...

• calculation is to take place in other units of weight, e.g. in English pounds (lb)?
  -> Then the nominal load is also specified in lb and implicitly brings along the new unit
  Note: 1 pound = 0.453592370 kg by definition
• acceleration due to gravity at the place of installation is not equal to the average of 9.80665 m/s²?
  -> in this case the normal local gravity can be entered via the object 0x8000:26. See note.
• the EL3356-0010, EL3356-0090 is to be used in Distributed Clocks mode?
  -> then DC and the process data Timestamp must be activated. See note.
• the EL3356-0090 is to be used in a safety application?
  -> Then it has to be considered that the measurement readings are frozen during automatic adjustment / self-calibration and
  ->when activating the TwinSAFE SC slot, the measured value has to be selected as INT32.
  Note the hints in chapter TwinSAFE SC process data EL3356-0090.
• dynamic weighing is demanded, i.e. high measuring accuracy is to be achieved despite rapidly varying loads? This can be the case, for example, when filling sacks or during the mechanical fastening of a bulk material receptacle.
  -> in this case the EL3356 offers three concepts: dynamic filter adaptation DynamicIIR, mode change and input freeze
• the self-calibration carried out every 3 minutes in the standard setting is not desired?
  -> in this case the repeat time is to be changed in the CoE or the calibration procedure itself is to be controlled via the control word.