User Tools

Site Tools


en-us_commands:reference:imodbusrtumem

This is an old revision of the document!


ImodbusRTUMem()

ImodbusRTUMem() sets the sizes of M and D memory used by the Slave.

ImodbusRTUMem command operation flow

void ImodbusRTUMem(uint16_t m_size, uint16_t d_size)

Commands

Command Arguments Return Value Operation
ImodbusRTUMem(m_size, d_size) uint16_t m_size
uint16_t d_size
void Sets the sizes of M and D memory used by the Slave.

Example

ImodbusRTUMem(100, 100);

Precautions

  • Keep calling the Slave or Master execution function in loop().
  • The data array size must be at least the requested quantity.
  • Do not treat return codes BUSY and IDLE as communication failures.
  • When sharing M and D with Cnet/MC Protocol, define a single final size and initialization order. Do not call ImodbusRTUMem() or ICnetMem() again at runtime.
  • Memory allocation functions do not return success status. For nonzero sizes, verify that M and D are not nullptr before accessing them in user code.

← Built-in Command List

en-us_commands/reference/imodbusrtumem.1788785567.txt.gz · Last modified: by 127.0.0.1

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki