User`s manual

Moxa C Programmable RTU Controllers Managing Communications

4-4

Installing PHP for Apache Web Server

The Moxa C programming RTU controller supports the PHP option. However, since the PHP file is 3 MB, it is not

installed by default. To install it, first make sure there is enough free space (at least 3 MB) on the target RTU

controller’s flash ROM.

Step 1: Check if the system contains enough free space by performing the df -h command.

192.168.127.254 - PuTTY

root@Moxa:/bin# df –h

Filesystem Size Used Available Use% Mounted on

/dev/mtdblock2 16.0M 6.7M 9.3M 42% /

/dev/ram0 499.0k 17.0k 457.0k 4% /var

/dev/mtdblock3 12.0M 896.0k 11.1M 7% /tmp

/dev/mtdblock3 12.0M 896.0k 11.1M 7% /home

/dev/mtdblock3 12.0M 896.0k 11.1M 7% /etc

tmpfs 30.4M 0 30.4M 0% /dev/shm

root@Moxa:/bin#

Checking the /dev/mtdblock3 to see if the available space is over 3 MB.

Step 2: Perfrom upramdisk command to create a temporary RAM disk to download and save the package.