Table of Contents
Advertisement
User Manual
GFK-1503F
Major Error
Code
12.4
Serial I/O COMMREQ Commands
The following COMMREQs are used to implement Serial I/O:
•
Local COMMREQs - do not receive or transmit data through the serial port.
•
Remote COMMREQs - receive and/or transmit data through the serial port.
Serial I/O / SNP / RTU Protocols
Description
6 (06h)
Modem responded with BUSY. Modem is unable to complete the
requested connection. The remote modem is already in use; retry the
connection request later.
7 (07h)
Modem responded with NO CARRIER. Modem is unable to complete
the requested connection. Check the local and remote modems and
the telephone line.
8 (08h)
Modem responded with NO DIALTONE. Modem is unable to
complete the requested connection. Check the modem connections
and the telephone line.
9 (09h)
Modem responded with ERROR. Modem is unable to complete the
requested command. Check the modem command string and
modem.
10 (0Ah)
Modem responded with RING, indicating that the modem is being
called by another modem. Modem is unable to complete the
requested command. Retry the modem command later.
11 (0Bh)
Unknown response received from the modem. Modem unable to
complete the request. Check the modem command string and
modem. Response should be CONNECT or OK.
50 (32h)
COMMREQ timeout. The COMMREQ did not complete within a 20-
second time limit.
Initialize Port (4300)
—
Set Up Input Buffer (4301)
—
Flush Input Buffer (4302)
—
Read Port Status (4303)
—
Write Port Control (4304)
—
Cancel Operation (4399)
—
Autodial (4400)
—
Write bytes (4401)
—
Read bytes (4402)
—
Read String (4403)
—
Chapter 12
Jan 2020
212
Advertisement
Table of Contents
