SIGMATEK CCP 521 C-DIAS processor module

These error codes are important clues for on-site troubleshooting. Engineers should quickly locate problems based on the code, such as POINT ER and CHKSUM, which are usually related to program memory modules or program errors; Watchdog and INT ERROR are often related to programming errors or interrupt handling; VARAN MANAGER ERROR and VARAN ERROR require checking the network topology, wiring, and power supply.

MicroSD card replacement and program updates

CCP 521 uses a microSD card as its internal storage device, and program updates can be performed through the integrated USB Host interface (USB storage device, keyboard). With the help of a replaceable microSD card, the entire control program can be easily swapped. When replacing the microSD card, the card is located under the LED cover. Carefully lift the LED cover, the microSD card is located on the left side, lightly press the card itself to eject. Remove the microSD card. Suggest using only the storage media provided by SIGMATEK, order number 12-630-051. The number of reads and writes has a significant impact on the lifespan of storage media, so frequent writes should be avoided. If the user program performs cyclic writing in the file, the "Flash Media Lifetime Calculation" tool in LASAL CLASS can be used to calculate the media lifetime under different writing scenarios.

In terms of application exceptions, it is not allowed to write remaining data in interrupt routines, otherwise it will cause system crashes. If more than 32 different sectors (each 512 bytes) are changed in a short period of time before turning off the power when the user program writes to the microSD card, it may sometimes result in partial loss of remaining data. The file system does not support secure writing through SRAM. If files are stored, modified, or written from the user program on the microSD card, these files must always be stored at a fixed maximum size. Due to size changes and the possibility of damaging the file system when turning off the power at the same time, subsequent changes to file size are not allowed. In addition, the CPU does not support data breakpoint functionality.

Installation, grounding, and shielding

CCP 521 is designed for installation inside control cabinets. To ensure optimal cooling of the module, it must be installed vertically. If a tilted installation position is used, forced convection (cooling fan) must be used. In terms of mechanical dimensions, the width is 129 mm, the height is 109.2 mm (including the cover), and the depth is 24.90 mm. Sufficient air circulation space must be ensured during installation.

Grounding connection is crucial. CCP 521 must be connected to the ground through the installation on the back wall of the control cabinet or the provided grounding terminal (C-DIAS module carrier). It is important to create a low ohm grounding connection in order to ensure fault free operation. The grounding connection should have the maximum cross-sectional area and maximum electrical surface area. Any noise signal that reaches CCP 521 through external cables must be filtered out through a grounding connection. Larger electrical surfaces can effectively dissipate high-frequency noise. The control box must be connected to the ground.

In terms of shielding, the wiring of CAN bus, Ethernet, and VARAN bus must be shielded. The low ohm shielding layer should be connected through a large surface (cable sheath, grounding clip) at the entrance of the control cabinet or directly in front of the CCP 521 processor module. This can prevent noise signals from reaching electronic devices and affecting their functionality. In terms of ESD protection, before connecting or disconnecting any equipment to CCP 521, the grounding potential should be balanced (by touching the control cabinet or grounding terminal). This can reduce static electricity (from clothing and shoes). Effective operational and safety guidelines must always be followed when working or operating on CCP 521. During installation, initial start-up, and product maintenance, relevant ESD protection measures must be taken, such as grounding employees before starting work.

There are specific suggestions for VARAN bus shielding. The VARAN real-time Ethernet bus system has very robust characteristics in industrial environments. By using the IEEE 802.3 standard Ethernet physical layer, the potential between the Ethernet line and the sending/receiving components is isolated. If an error occurs, VARAN Manager will immediately repeat the message to the bus participants. Suggest using CAT5e industrial Ethernet bus cable and shielding with S-FTP cable. The S-FTP bus is a symmetrical multi wire cable with unshielded pairs. The total shielding adopts a combination of foil and weaving. Recommend using non laminated variants. VARAN cables must be fixed at a distance of 20 cm from the connector to prevent vibration.

Shielding connection method for different scenarios: When connecting the control cabinet to the external VARAN component, the shielding should be placed at the entrance of the control cabinet casing, and the noise should be dissipated before reaching the electronic component. Only when wiring outside the control cabinet, if only IP67 modules and connectors are used, there is no need for additional shielding connections. These components are very sturdy and noise resistant. The shielding of all sockets in the IP67 module is internally connected to the common bus or electrically connected to the housing, and the deflection of voltage spikes does not flow through electronic devices. When wiring inside the control cabinet, strong electromagnetic noise sources (drivers, transformers, etc.) inside the control cabinet may induce interference in the VARAN bus. Voltage spikes are dissipated through the metal shell of the RJ45 connector, and noise is conducted through the control cabinet without the need for additional measures on the electronic component circuit board. To avoid sources of data exchange errors, it is recommended to place a shield in front of any electronic components inside the control cabinet. When connecting components that generate noise, shielding should be placed in front of the power element (or group of power elements). When connecting two control cabinets, it is recommended to place shields at the entry points of each cabinet to prevent noise from reaching the electronic components in both cabinets.