CR1000 Manual - Campbell Scientific

Section 7. Installation
7.8.2.9 Micro-Serial Server
The CR1000 can be configured to allow serial communication over a TCP/IP port.
This is useful when communicating with a serial sensor over ethernet via microserial
server (third-party serial to ethernet interface) to which the serial sensor is
connected. See the network-link manual and the CRBasic Editor Help for the
TCPOpen() instruction for more information. Information on available network
links is available in the appendix Network Links (p. 567).
7.8.2.10 Modbus TCP/IP
7.8.2.11 DHCP
7.8.2.12 DNS
7.8.2.13 SMTP
The CR1000 can perform Modbus communication over TCP/IP using the Modbus
TCP/IP interface. To set up Modbus TCP/IP, specify port 502 as the ComPort in
the ModBusMaster() and ModBusSlave() instructions. See the CRBasic Editor
Help for more information.
When connected to a server with a list of IP addresses available for assignment,
the CR1000 will automatically request and obtain an IP address through the
Dynamic Host Configuration Protocol (DHCP). Once the address is assigned, use
DevConfig, PakBusGraph, Connect, or the external keyboard / display to look in
the CR1000 Status table to see the assigned IP address. This is shown under the
field name IPInfo.
The CR1000 provides a Domain Name Server (DNS) client that can query a DNS
server to determine if an IP address has been mapped to a hostname. If it has, then
the hostname can be used interchangeably with the IP address in some datalogger
instructions.
Simple Mail Transfer Protocol (SMTP) is the standard for e-mail transmissions.
The CR1000 can be programmed to send e-mail messages on a regular schedule
or based on the occurrence of an event.
7.8.3 SDI-12 Sensor Support
Multiple SDI-12 sensors can be connected to each of 4 channels on the CR1000:
C1, C3, C5, C7. If multiple sensors are wired to a single channel, each sensor
must have a unique address. SDI-12 standard v 1.3 sensors accept addresses 0 -
9, a - z, and A - Z. For a CRBasic programming example demonstrating the
changing of a sensor SDI-12 address on the fly, see Campbell Scientific
publication PS200/CH200 12 V Charging Regulators, which is available at
www.campbellsci.com.
The CR1000 supports SDI-12 communication through two modes – transparent
mode and programmed mode.
• Transparent mode facilitates sensor setup and troubleshooting. It allows
commands to be manually issued and the full sensor response viewed.
Transparent mode does not record data.
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