Channel mode register, Channel relay control register – HP E1418A User Manual
Page 137
Channel Mode
Register
The Channel Mode Register reports or programs the voltage or current
operating mode for each channel.
Address
Base + 1A
16
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
READ
Ch
16
Mode
Ch
15
Mode
Ch
14
Mode
Ch
13
Mode
Ch
12
Mode
Ch
11
Mode
Ch
10
Mode
Ch
09
Mode
Ch
08
Mode
Ch
07
Mode
Ch
06
Mode
Ch
05
Mode
Ch
04
Mode
Ch
03
Mode
Ch
02
Mode
Ch
01
Mode
WRITE
Ch XX Mode: Writing a one (1) to this field selects the voltage output
mode for that channel. Writing a zero (0) to this field selects the current
output mode for that channel.
The mode program jumpers on the terminal module override values written
to this register. When the P/J jumper for a channel is set to jumper
selectable, writing to this register has no effect.
Reading this register returns the channel mode. The channel mode is
reported in this register for both VXIbus backplane programming and
jumper programming on the terminal module.
Note
Channels 09 through 16 will return ones (1) if the module is configured as
an 8-channel device.
Channel Relay
Control Register
The Channel Relay Control Register programs and reports the state of each
channel relay.
Address
Base + 1C
16
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
READ
Ch
16
Relay
Ch
15
Relay
Ch
14
Relay
Ch
13
Relay
Ch
12
Relay
Ch
11
Relay
Ch
10
Relay
Ch
09
Relay
Ch
08
Relay
Ch
07
Relay
Ch
06
Relay
Ch
05
Relay
Ch
04
Relay
Ch
03
Relay
Ch
02
Relay
Ch
01
Relay
WRITE
Ch XX Relay: Writing a one (1) to this field opens the channel relay.
Writing a zero (0) to this field closes the channel relay. The write operation
will complete before the relays change state. The relays take approximately
5 milliseconds to change state.
Reading this register returns a one (1) in each field if the channel relay is
programmed open and a zero (0) if the channel relay is programmed closed.
Note
Channels 09 through 16 will return ones (1) if the module is configured as
an 8-channel device.
136 HP E1418A Register-Based Programming
Appendix B
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